diff --git a/Make.engine b/Make.engine
index c600a78..e0fd52e 100644
--- a/Make.engine
+++ b/Make.engine
@@ -12,7 +12,12 @@ OPS_OBJS=ops/abCOp.o ops/abCOpAdd.o ops/abCOpSubtr.o ops/abCOpMult.o \
     ops/abCOpDiv.o ops/abCOpPower.o ops/abCOpAnd.o ops/abCOpOr.o ops/abCOpXor.o \
     ops/abCOpNot.o ops/abCOpBin.o ops/abCOpOct.o ops/abCOpDec.o ops/abCOpHex.o \
     ops/abCOpStws.o ops/abCOpRcws.o ops/abCOpSl.o ops/abCOpRl.o ops/abCOpSr.o \
-    ops/abCOpRr.o ops/abCOpAsr.o ops/abCOpInv.o ops/abCOpChs.o ops/abCOpDrop.o
+    ops/abCOpRr.o ops/abCOpAsr.o ops/abCOpInv.o ops/abCOpChs.o ops/abCOpDrop.o \
+    ops/abCOpSwap.o ops/abCOpSin.o ops/abCOpCos.o ops/abCOpTan.o ops/abCOpAsin.o \
+    ops/abCOpAcos.o ops/abCOpAtan.o ops/abCOpSq.o ops/abCOpSqrt.o ops/abCOpPi.o \
+    ops/abCOpLog.o ops/abCOpAlog.o ops/abCOpLn.o ops/abCOpExp.o ops/abCOpLnp1.o \
+    ops/abCOpExpm.o ops/abCOpSinh.o ops/abCOpAsinh.o ops/abCOpCosh.o \
+    ops/abCOpAcosh.o ops/abCOpTanh.o ops/abCOpAtanh.o ops/abCOpClear.o
 
 SHELL_OBJS=abCMain.o $(CALC_OBJS) $(EXPR_OBJS) $(OPS_OBJS)
 
@@ -61,4 +66,27 @@ ops/abCOpAsr.o: ops/abCOp.h abCMode.h abCError.h abCStack.h expr/abCExpr.h expr/
 ops/abCOpInv.o: ops/abCOp.h abCError.h abCStack.h expr/abCExpr.h expr/abCExpReal.h ops/abCOpInv.h
 ops/abCOpChs.o: ops/abCOp.h abCError.h abCStack.h expr/abCExpr.h expr/abCExpReal.h ops/abCOpChs.h
 ops/abCOpDrop.o: ops/abCOp.h abCError.h abCStack.h expr/abCExpr.h ops/abCOpDrop.h
+ops/abCOpSwap.o: ops/abCOp.h abCError.h abCStack.h expr/abCExpr.h ops/abCOpSwap.h
+ops/abCOpSin.o: ops/abCOp.h abCError.h abCStack.h expr/abCExpr.h expr/abCExpReal.h ops/abCOpSin.h
+ops/abCOpCos.o: ops/abCOp.h abCError.h abCStack.h expr/abCExpr.h expr/abCExpReal.h ops/abCOpCos.h
+ops/abCOpTan.o: ops/abCOp.h abCError.h abCStack.h expr/abCExpr.h expr/abCExpReal.h ops/abCOpTan.h
+ops/abCOpAsin.o: ops/abCOp.h abCError.h abCStack.h expr/abCExpr.h expr/abCExpReal.h ops/abCOpAsin.h
+ops/abCOpAcos.o: ops/abCOp.h abCError.h abCStack.h expr/abCExpr.h expr/abCExpReal.h ops/abCOpAcos.h
+ops/abCOpAtan.o: ops/abCOp.h abCError.h abCStack.h expr/abCExpr.h expr/abCExpReal.h ops/abCOpAtan.h
+ops/abCOpSq.o: ops/abCOp.h abCError.h abCStack.h expr/abCExpr.h expr/abCExpReal.h ops/abCOpSq.h
+ops/abCOpSqrt.o: ops/abCOp.h abCError.h abCStack.h expr/abCExpr.h expr/abCExpReal.h ops/abCOpSqrt.h
+ops/abCOpPi.o: ops/abCOp.h abCStack.h expr/abCExpr.h expr/abCExpReal.h ops/abCOpPi.h
+ops/abCOpLog.o: ops/abCOp.h abCError.h abCStack.h expr/abCExpr.h expr/abCExpReal.h ops/abCOpLog.h
+ops/abCOpAlog.o: ops/abCOp.h abCError.h abCStack.h expr/abCExpr.h expr/abCExpReal.h ops/abCOpAlog.h
+ops/abCOpLn.o: ops/abCOp.h abCError.h abCStack.h expr/abCExpr.h expr/abCExpReal.h ops/abCOpLn.h
+ops/abCOpExp.o: ops/abCOp.h abCError.h abCStack.h expr/abCExpr.h expr/abCExpReal.h ops/abCOpExp.h
+ops/abCOpLnp1.o: ops/abCOp.h abCError.h abCStack.h expr/abCExpr.h expr/abCExpReal.h ops/abCOpLnp1.h
+ops/abCOpExpm.o: ops/abCOp.h abCError.h abCStack.h expr/abCExpr.h expr/abCExpReal.h ops/abCOpExpm.h
+ops/abCOpSinh.o: ops/abCOp.h abCError.h abCStack.h expr/abCExpr.h expr/abCExpReal.h ops/abCOpSinh.h
+ops/abCOpAsinh.o: ops/abCOp.h abCError.h abCStack.h expr/abCExpr.h expr/abCExpReal.h ops/abCOpAsinh.h
+ops/abCOpCosh.o: ops/abCOp.h abCError.h abCStack.h expr/abCExpr.h expr/abCExpReal.h ops/abCOpCosh.h
+ops/abCOpAcosh.o: ops/abCOp.h abCError.h abCStack.h expr/abCExpr.h expr/abCExpReal.h ops/abCOpAcosh.h
+ops/abCOpTanh.o: ops/abCOp.h abCError.h abCStack.h expr/abCExpr.h expr/abCExpReal.h ops/abCOpTanh.h
+ops/abCOpAtanh.o: ops/abCOp.h abCError.h abCStack.h expr/abCExpr.h expr/abCExpReal.h ops/abCOpAtanh.h
+ops/abCOpClear.o: ops/abCOp.h abCStack.h ops/abCOpClear.h
 
diff --git a/abCStack.c b/abCStack.c
index 619b60d..480568d 100644
--- a/abCStack.c
+++ b/abCStack.c
@@ -91,3 +91,9 @@ char *abCalcStackExprStringAt(int depth, char *buffer)
 
     return buffer;
 }
+
+
+void abCalcStackClear(void)
+{
+    gStackNumItems = 0;
+}
diff --git a/abCStack.h b/abCStack.h
index 080aeb1..e29562b 100644
--- a/abCStack.h
+++ b/abCStack.h
@@ -26,5 +26,7 @@ char *abCalcStackExprStringAt(int depth, char *buffer);
 
 int abCalcStackNumItems(void);
 
+void abCalcStackClear(void);
+
 
 #endif
diff --git a/ops/abCOp.c b/ops/abCOp.c
index de863f9..2873b1a 100644
--- a/ops/abCOp.c
+++ b/ops/abCOp.c
@@ -19,9 +19,36 @@
 #include "ops/abCOpSubtr.h"
 #include "ops/abCOpMult.h"
 #include "ops/abCOpDiv.h"
-#include "ops/abCOpPower.h"
-#include "ops/abCOpInv.h"
 #include "ops/abCOpChs.h"
+#include "ops/abCOpInv.h"
+#include "ops/abCOpSq.h"
+#include "ops/abCOpSqrt.h"
+#include "ops/abCOpPower.h"
+
+#include "ops/abCOpDrop.h"
+#include "ops/abCOpSwap.h"
+#include "ops/abCOpClear.h"
+
+#include "ops/abCOpPi.h"
+#include "ops/abCOpSin.h"
+#include "ops/abCOpCos.h"
+#include "ops/abCOpTan.h"
+#include "ops/abCOpAsin.h"
+#include "ops/abCOpAcos.h"
+#include "ops/abCOpAtan.h"
+
+#include "ops/abCOpLog.h"
+#include "ops/abCOpAlog.h"
+#include "ops/abCOpLn.h"
+#include "ops/abCOpExp.h"
+#include "ops/abCOpLnp1.h"
+#include "ops/abCOpExpm.h"
+#include "ops/abCOpSinh.h"
+#include "ops/abCOpAsinh.h"
+#include "ops/abCOpCosh.h"
+#include "ops/abCOpAcosh.h"
+#include "ops/abCOpTanh.h"
+#include "ops/abCOpAtanh.h"
 
 #include "ops/abCOpAnd.h"
 #include "ops/abCOpOr.h"
@@ -56,11 +83,36 @@ void abCalcOpInit(void)
     abCalcOpSubtrInit();
     abCalcOpMultInit();
     abCalcOpDivInit();
-    abCalcOpPowerInit();
-    abCalcOpInvInit();
     abCalcOpChsInit();
+    abCalcOpInvInit();
+    abCalcOpSqInit();
+    abCalcOpSqrtInit();
+    abCalcOpPowerInit();
 
     abCalcOpDropInit();
+    abCalcOpSwapInit();
+    abCalcOpClearInit();
+
+    abCalcOpPiInit();
+    abCalcOpSinInit();
+    abCalcOpCosInit();
+    abCalcOpTanInit();
+    abCalcOpAsinInit();
+    abCalcOpAcosInit();
+    abCalcOpAtanInit();
+
+    abCalcOpLogInit();
+    abCalcOpAlogInit();
+    abCalcOpLnInit();
+    abCalcOpExpInit();
+    abCalcOpLnp1Init();
+    abCalcOpExpmInit();
+    abCalcOpSinhInit();
+    abCalcOpAsinhInit();
+    abCalcOpCoshInit();
+    abCalcOpAcoshInit();
+    abCalcOpTanhInit();
+    abCalcOpAtanhInit();
 
     abCalcOpAndInit();
     abCalcOpOrInit();
diff --git a/ops/abCOpAcos.c b/ops/abCOpAcos.c
new file mode 100644
index 0000000..55deec5
--- /dev/null
+++ b/ops/abCOpAcos.c
@@ -0,0 +1,52 @@
+/* 
+    abCOpAcos.c
+        By: Jeremy Rand
+ */
+
+
+#include <math.h>
+#include <stdio.h>
+
+#include "abCError.h"
+#include "abCStack.h"
+
+#include "expr/abCExpr.h"
+#include "expr/abCExpReal.h"
+
+#include "ops/abCOp.h"
+#include "ops/abCOpAcos.h"
+
+
+#define ACOS_NAME "ACOS"
+
+
+static void acosExecute(void);
+
+
+void abCalcOpAcosInit(void)
+{
+    abCalcOpRegister(ACOS_NAME, acosExecute);
+}
+
+
+void acosExecute(void)
+{
+    abCalcExpr result;
+    AB_CALC_OP_ONE_ARG(ACOS_NAME);
+
+    if (expr->type != abCalcExprTypeReal) {
+        abCalcRaiseError(abCalcBadArgTypeError, ACOS_NAME);
+        return;
+    }
+
+    if ((expr->u.real < -1.0) ||
+        (expr->u.real > 1.0)) {
+        abCalcRaiseError(abCalcComplexResultError, ACOS_NAME);
+        return;
+    }
+
+    abCalcExprRealSet(&result, acos(expr->u.real));
+
+    abCalcStackExprPop(NULL);
+    abCalcStackExprPush(&result);
+}
diff --git a/ops/abCOpAcos.h b/ops/abCOpAcos.h
new file mode 100644
index 0000000..157c75a
--- /dev/null
+++ b/ops/abCOpAcos.h
@@ -0,0 +1,14 @@
+/* 
+    abCOpAcos.h
+        By: Jeremy Rand
+ */
+
+
+#ifndef ABCOPACOS_H
+#define ABCOPACOS_H
+
+
+void abCalcOpAcosInit(void);
+
+
+#endif
diff --git a/ops/abCOpAcosh.c b/ops/abCOpAcosh.c
new file mode 100644
index 0000000..c70471e
--- /dev/null
+++ b/ops/abCOpAcosh.c
@@ -0,0 +1,51 @@
+/* 
+    abCOpAcosh.c
+        By: Jeremy Rand
+ */
+
+
+#include <math.h>
+#include <stdio.h>
+
+#include "abCError.h"
+#include "abCStack.h"
+
+#include "expr/abCExpr.h"
+#include "expr/abCExpReal.h"
+
+#include "ops/abCOp.h"
+#include "ops/abCOpAcosh.h"
+
+
+#define ACOSH_NAME "ACOSH"
+
+
+static void acoshExecute(void);
+
+
+void abCalcOpAcoshInit(void)
+{
+    abCalcOpRegister(ACOSH_NAME, acoshExecute);
+}
+
+
+void acoshExecute(void)
+{
+    abCalcExpr result;
+    AB_CALC_OP_ONE_ARG(ACOSH_NAME);
+
+    if (expr->type != abCalcExprTypeReal) {
+        abCalcRaiseError(abCalcBadArgTypeError, ACOSH_NAME);
+        return;
+    }
+
+    if (expr->u.real < 1.0) {
+        abCalcRaiseError(abCalcComplexResultError, ACOSH_NAME);
+        return;
+    }
+
+    abCalcExprRealSet(&result, acosh(expr->u.real));
+
+    abCalcStackExprPop(NULL);
+    abCalcStackExprPush(&result);
+}
diff --git a/ops/abCOpAcosh.h b/ops/abCOpAcosh.h
new file mode 100644
index 0000000..79a087d
--- /dev/null
+++ b/ops/abCOpAcosh.h
@@ -0,0 +1,14 @@
+/* 
+    abCOpAcosh.h
+        By: Jeremy Rand
+ */
+
+
+#ifndef ABCOPACOSH_H
+#define ABCOPACOSH_H
+
+
+void abCalcOpAcoshInit(void);
+
+
+#endif
diff --git a/ops/abCOpAlog.c b/ops/abCOpAlog.c
new file mode 100644
index 0000000..dd13648
--- /dev/null
+++ b/ops/abCOpAlog.c
@@ -0,0 +1,46 @@
+/* 
+    abCOpAlog.c
+        By: Jeremy Rand
+ */
+
+
+#include <math.h>
+#include <stdio.h>
+
+#include "abCError.h"
+#include "abCStack.h"
+
+#include "expr/abCExpr.h"
+#include "expr/abCExpReal.h"
+
+#include "ops/abCOp.h"
+#include "ops/abCOpAlog.h"
+
+
+#define ALOG_NAME "ALOG"
+
+
+static void alogExecute(void);
+
+
+void abCalcOpAlogInit(void)
+{
+    abCalcOpRegister(ALOG_NAME, alogExecute);
+}
+
+
+void alogExecute(void)
+{
+    abCalcExpr result;
+    AB_CALC_OP_ONE_ARG(ALOG_NAME);
+
+    if (expr->type != abCalcExprTypeReal) {
+        abCalcRaiseError(abCalcBadArgTypeError, ALOG_NAME);
+        return;
+    }
+
+    abCalcExprRealSet(&result, pow(10.0, expr->u.real));
+
+    abCalcStackExprPop(NULL);
+    abCalcStackExprPush(&result);
+}
diff --git a/ops/abCOpAlog.h b/ops/abCOpAlog.h
new file mode 100644
index 0000000..fd49111
--- /dev/null
+++ b/ops/abCOpAlog.h
@@ -0,0 +1,14 @@
+/* 
+    abCOpAlog.h
+        By: Jeremy Rand
+ */
+
+
+#ifndef ABCOPALOG_H
+#define ABCOPALOG_H
+
+
+void abCalcOpAlogInit(void);
+
+
+#endif
diff --git a/ops/abCOpAsin.c b/ops/abCOpAsin.c
new file mode 100644
index 0000000..e1d1627
--- /dev/null
+++ b/ops/abCOpAsin.c
@@ -0,0 +1,52 @@
+/* 
+    abCOpAsin.c
+        By: Jeremy Rand
+ */
+
+
+#include <math.h>
+#include <stdio.h>
+
+#include "abCError.h"
+#include "abCStack.h"
+
+#include "expr/abCExpr.h"
+#include "expr/abCExpReal.h"
+
+#include "ops/abCOp.h"
+#include "ops/abCOpAsin.h"
+
+
+#define ASIN_NAME "ASIN"
+
+
+static void asinExecute(void);
+
+
+void abCalcOpAsinInit(void)
+{
+    abCalcOpRegister(ASIN_NAME, asinExecute);
+}
+
+
+void asinExecute(void)
+{
+    abCalcExpr result;
+    AB_CALC_OP_ONE_ARG(ASIN_NAME);
+
+    if (expr->type != abCalcExprTypeReal) {
+        abCalcRaiseError(abCalcBadArgTypeError, ASIN_NAME);
+        return;
+    }
+
+    if ((expr->u.real < -1.0) ||
+        (expr->u.real > 1.0)) {
+        abCalcRaiseError(abCalcComplexResultError, ASIN_NAME);
+        return;
+    }
+
+    abCalcExprRealSet(&result, asin(expr->u.real));
+
+    abCalcStackExprPop(NULL);
+    abCalcStackExprPush(&result);
+}
diff --git a/ops/abCOpAsin.h b/ops/abCOpAsin.h
new file mode 100644
index 0000000..f6d88cf
--- /dev/null
+++ b/ops/abCOpAsin.h
@@ -0,0 +1,14 @@
+/* 
+    abCOpAsin.h
+        By: Jeremy Rand
+ */
+
+
+#ifndef ABCOPASIN_H
+#define ABCOPASIN_H
+
+
+void abCalcOpAsinInit(void);
+
+
+#endif
diff --git a/ops/abCOpAsinh.c b/ops/abCOpAsinh.c
new file mode 100644
index 0000000..ecc84cd
--- /dev/null
+++ b/ops/abCOpAsinh.c
@@ -0,0 +1,46 @@
+/* 
+    abCOpAsinh.c
+        By: Jeremy Rand
+ */
+
+
+#include <math.h>
+#include <stdio.h>
+
+#include "abCError.h"
+#include "abCStack.h"
+
+#include "expr/abCExpr.h"
+#include "expr/abCExpReal.h"
+
+#include "ops/abCOp.h"
+#include "ops/abCOpAsinh.h"
+
+
+#define ASINH_NAME "ASINH"
+
+
+static void asinhExecute(void);
+
+
+void abCalcOpAsinhInit(void)
+{
+    abCalcOpRegister(ASINH_NAME, asinhExecute);
+}
+
+
+void asinhExecute(void)
+{
+    abCalcExpr result;
+    AB_CALC_OP_ONE_ARG(ASINH_NAME);
+
+    if (expr->type != abCalcExprTypeReal) {
+        abCalcRaiseError(abCalcBadArgTypeError, ASINH_NAME);
+        return;
+    }
+
+    abCalcExprRealSet(&result, asinh(expr->u.real));
+
+    abCalcStackExprPop(NULL);
+    abCalcStackExprPush(&result);
+}
diff --git a/ops/abCOpAsinh.h b/ops/abCOpAsinh.h
new file mode 100644
index 0000000..dbf8596
--- /dev/null
+++ b/ops/abCOpAsinh.h
@@ -0,0 +1,14 @@
+/* 
+    abCOpAsinh.h
+        By: Jeremy Rand
+ */
+
+
+#ifndef ABCOPASINH_H
+#define ABCOPASINH_H
+
+
+void abCalcOpAsinhInit(void);
+
+
+#endif
diff --git a/ops/abCOpAtan.c b/ops/abCOpAtan.c
new file mode 100644
index 0000000..2ceaf9c
--- /dev/null
+++ b/ops/abCOpAtan.c
@@ -0,0 +1,46 @@
+/* 
+    abCOpAtan.c
+        By: Jeremy Rand
+ */
+
+
+#include <math.h>
+#include <stdio.h>
+
+#include "abCError.h"
+#include "abCStack.h"
+
+#include "expr/abCExpr.h"
+#include "expr/abCExpReal.h"
+
+#include "ops/abCOp.h"
+#include "ops/abCOpAtan.h"
+
+
+#define ATAN_NAME "ATAN"
+
+
+static void atanExecute(void);
+
+
+void abCalcOpAtanInit(void)
+{
+    abCalcOpRegister(ATAN_NAME, atanExecute);
+}
+
+
+void atanExecute(void)
+{
+    abCalcExpr result;
+    AB_CALC_OP_ONE_ARG(ATAN_NAME);
+
+    if (expr->type != abCalcExprTypeReal) {
+        abCalcRaiseError(abCalcBadArgTypeError, ATAN_NAME);
+        return;
+    }
+
+    abCalcExprRealSet(&result, atan(expr->u.real));
+
+    abCalcStackExprPop(NULL);
+    abCalcStackExprPush(&result);
+}
diff --git a/ops/abCOpAtan.h b/ops/abCOpAtan.h
new file mode 100644
index 0000000..fb38491
--- /dev/null
+++ b/ops/abCOpAtan.h
@@ -0,0 +1,14 @@
+/* 
+    abCOpAtan.h
+        By: Jeremy Rand
+ */
+
+
+#ifndef ABCOPATAN_H
+#define ABCOPATAN_H
+
+
+void abCalcOpAtanInit(void);
+
+
+#endif
diff --git a/ops/abCOpAtanh.c b/ops/abCOpAtanh.c
new file mode 100644
index 0000000..96e8e68
--- /dev/null
+++ b/ops/abCOpAtanh.c
@@ -0,0 +1,57 @@
+/* 
+    abCOpAtanh.c
+        By: Jeremy Rand
+ */
+
+
+#include <math.h>
+#include <stdio.h>
+
+#include "abCError.h"
+#include "abCStack.h"
+
+#include "expr/abCExpr.h"
+#include "expr/abCExpReal.h"
+
+#include "ops/abCOp.h"
+#include "ops/abCOpAtanh.h"
+
+
+#define ATANH_NAME "ATANH"
+
+
+static void atanhExecute(void);
+
+
+void abCalcOpAtanhInit(void)
+{
+    abCalcOpRegister(ATANH_NAME, atanhExecute);
+}
+
+
+void atanhExecute(void)
+{
+    abCalcExpr result;
+    AB_CALC_OP_ONE_ARG(ATANH_NAME);
+
+    if (expr->type != abCalcExprTypeReal) {
+        abCalcRaiseError(abCalcBadArgTypeError, ATANH_NAME);
+        return;
+    }
+
+    if ((expr->u.real == 1.0) ||
+        (expr->u.real == -1.0)) {
+        abCalcRaiseError(abCalcInfiniteResultError, ATANH_NAME);
+        return;
+    }
+    if ((expr->u.real > 1.0) ||
+        (expr->u.real < -1.0)) {
+        abCalcRaiseError(abCalcComplexResultError, ATANH_NAME);
+        return;
+    }
+
+    abCalcExprRealSet(&result, atanh(expr->u.real));
+
+    abCalcStackExprPop(NULL);
+    abCalcStackExprPush(&result);
+}
diff --git a/ops/abCOpAtanh.h b/ops/abCOpAtanh.h
new file mode 100644
index 0000000..15b7afc
--- /dev/null
+++ b/ops/abCOpAtanh.h
@@ -0,0 +1,14 @@
+/* 
+    abCOpAtanh.h
+        By: Jeremy Rand
+ */
+
+
+#ifndef ABCOPATANH_H
+#define ABCOPATANH_H
+
+
+void abCalcOpAtanhInit(void);
+
+
+#endif
diff --git a/ops/abCOpClear.c b/ops/abCOpClear.c
new file mode 100644
index 0000000..98cf922
--- /dev/null
+++ b/ops/abCOpClear.c
@@ -0,0 +1,31 @@
+/* 
+    abCOpClear.c
+        By: Jeremy Rand
+ */
+
+
+#include <math.h>
+#include <stdio.h>
+
+#include "abCStack.h"
+
+#include "ops/abCOp.h"
+#include "ops/abCOpClear.h"
+
+
+#define CLEAR_NAME "CLEAR"
+
+
+static void clearExecute(void);
+
+
+void abCalcOpClearInit(void)
+{
+    abCalcOpRegister(CLEAR_NAME, clearExecute);
+}
+
+
+void clearExecute(void)
+{
+    abCalcStackClear();
+}
diff --git a/ops/abCOpClear.h b/ops/abCOpClear.h
new file mode 100644
index 0000000..c7b45f6
--- /dev/null
+++ b/ops/abCOpClear.h
@@ -0,0 +1,14 @@
+/* 
+    abCOpClean.h
+        By: Jeremy Rand
+ */
+
+
+#ifndef ABCOPCLEAR_H
+#define ABCOPCLEAR_H
+
+
+void abCalcOpClearInit(void);
+
+
+#endif
diff --git a/ops/abCOpCos.c b/ops/abCOpCos.c
new file mode 100644
index 0000000..44a00a5
--- /dev/null
+++ b/ops/abCOpCos.c
@@ -0,0 +1,46 @@
+/* 
+    abCOpCos.c
+        By: Jeremy Rand
+ */
+
+
+#include <math.h>
+#include <stdio.h>
+
+#include "abCError.h"
+#include "abCStack.h"
+
+#include "expr/abCExpr.h"
+#include "expr/abCExpReal.h"
+
+#include "ops/abCOp.h"
+#include "ops/abCOpCos.h"
+
+
+#define COS_NAME "COS"
+
+
+static void cosExecute(void);
+
+
+void abCalcOpCosInit(void)
+{
+    abCalcOpRegister(COS_NAME, cosExecute);
+}
+
+
+void cosExecute(void)
+{
+    abCalcExpr result;
+    AB_CALC_OP_ONE_ARG(COS_NAME);
+
+    if (expr->type != abCalcExprTypeReal) {
+        abCalcRaiseError(abCalcBadArgTypeError, COS_NAME);
+        return;
+    }
+
+    abCalcExprRealSet(&result, cos(expr->u.real));
+
+    abCalcStackExprPop(NULL);
+    abCalcStackExprPush(&result);
+}
diff --git a/ops/abCOpCos.h b/ops/abCOpCos.h
new file mode 100644
index 0000000..57edc5b
--- /dev/null
+++ b/ops/abCOpCos.h
@@ -0,0 +1,14 @@
+/* 
+    abCOpCos.h
+        By: Jeremy Rand
+ */
+
+
+#ifndef ABCOPCOS_H
+#define ABCOPCOS_H
+
+
+void abCalcOpCosInit(void);
+
+
+#endif
diff --git a/ops/abCOpCosh.c b/ops/abCOpCosh.c
new file mode 100644
index 0000000..f34a929
--- /dev/null
+++ b/ops/abCOpCosh.c
@@ -0,0 +1,46 @@
+/* 
+    abCOpCosh.c
+        By: Jeremy Rand
+ */
+
+
+#include <math.h>
+#include <stdio.h>
+
+#include "abCError.h"
+#include "abCStack.h"
+
+#include "expr/abCExpr.h"
+#include "expr/abCExpReal.h"
+
+#include "ops/abCOp.h"
+#include "ops/abCOpCosh.h"
+
+
+#define COSH_NAME "COSH"
+
+
+static void coshExecute(void);
+
+
+void abCalcOpCoshInit(void)
+{
+    abCalcOpRegister(COSH_NAME, coshExecute);
+}
+
+
+void coshExecute(void)
+{
+    abCalcExpr result;
+    AB_CALC_OP_ONE_ARG(COSH_NAME);
+
+    if (expr->type != abCalcExprTypeReal) {
+        abCalcRaiseError(abCalcBadArgTypeError, COSH_NAME);
+        return;
+    }
+
+    abCalcExprRealSet(&result, cosh(expr->u.real));
+
+    abCalcStackExprPop(NULL);
+    abCalcStackExprPush(&result);
+}
diff --git a/ops/abCOpCosh.h b/ops/abCOpCosh.h
new file mode 100644
index 0000000..5e1b4bf
--- /dev/null
+++ b/ops/abCOpCosh.h
@@ -0,0 +1,14 @@
+/* 
+    abCOpCosh.h
+        By: Jeremy Rand
+ */
+
+
+#ifndef ABCOPCOSH_H
+#define ABCOPCOSH_H
+
+
+void abCalcOpCoshInit(void);
+
+
+#endif
diff --git a/ops/abCOpExp.c b/ops/abCOpExp.c
new file mode 100644
index 0000000..74cb743
--- /dev/null
+++ b/ops/abCOpExp.c
@@ -0,0 +1,46 @@
+/* 
+    abCOpExp.c
+        By: Jeremy Rand
+ */
+
+
+#include <math.h>
+#include <stdio.h>
+
+#include "abCError.h"
+#include "abCStack.h"
+
+#include "expr/abCExpr.h"
+#include "expr/abCExpReal.h"
+
+#include "ops/abCOp.h"
+#include "ops/abCOpExp.h"
+
+
+#define EXP_NAME "EXP"
+
+
+static void expExecute(void);
+
+
+void abCalcOpExpInit(void)
+{
+    abCalcOpRegister(EXP_NAME, expExecute);
+}
+
+
+void expExecute(void)
+{
+    abCalcExpr result;
+    AB_CALC_OP_ONE_ARG(EXP_NAME);
+
+    if (expr->type != abCalcExprTypeReal) {
+        abCalcRaiseError(abCalcBadArgTypeError, EXP_NAME);
+        return;
+    }
+
+    abCalcExprRealSet(&result, exp(expr->u.real));
+
+    abCalcStackExprPop(NULL);
+    abCalcStackExprPush(&result);
+}
diff --git a/ops/abCOpExp.h b/ops/abCOpExp.h
new file mode 100644
index 0000000..4c8492a
--- /dev/null
+++ b/ops/abCOpExp.h
@@ -0,0 +1,14 @@
+/* 
+    abCOpExp.h
+        By: Jeremy Rand
+ */
+
+
+#ifndef ABCOPEXP_H
+#define ABCOPEXP_H
+
+
+void abCalcOpExpInit(void);
+
+
+#endif
diff --git a/ops/abCOpExpm.c b/ops/abCOpExpm.c
new file mode 100644
index 0000000..bce38fa
--- /dev/null
+++ b/ops/abCOpExpm.c
@@ -0,0 +1,46 @@
+/* 
+    abCOpExpm.c
+        By: Jeremy Rand
+ */
+
+
+#include <math.h>
+#include <stdio.h>
+
+#include "abCError.h"
+#include "abCStack.h"
+
+#include "expr/abCExpr.h"
+#include "expr/abCExpReal.h"
+
+#include "ops/abCOp.h"
+#include "ops/abCOpExpm.h"
+
+
+#define EXPM_NAME "EXPM"
+
+
+static void expmExecute(void);
+
+
+void abCalcOpExpmInit(void)
+{
+    abCalcOpRegister(EXPM_NAME, expmExecute);
+}
+
+
+void expmExecute(void)
+{
+    abCalcExpr result;
+    AB_CALC_OP_ONE_ARG(EXPM_NAME);
+
+    if (expr->type != abCalcExprTypeReal) {
+        abCalcRaiseError(abCalcBadArgTypeError, EXPM_NAME);
+        return;
+    }
+
+    abCalcExprRealSet(&result, expm1(expr->u.real));
+
+    abCalcStackExprPop(NULL);
+    abCalcStackExprPush(&result);
+}
diff --git a/ops/abCOpExpm.h b/ops/abCOpExpm.h
new file mode 100644
index 0000000..f475773
--- /dev/null
+++ b/ops/abCOpExpm.h
@@ -0,0 +1,14 @@
+/* 
+    abCOpExpm.h
+        By: Jeremy Rand
+ */
+
+
+#ifndef ABCOPEXPM_H
+#define ABCOPEXPM_H
+
+
+void abCalcOpExpmInit(void);
+
+
+#endif
diff --git a/ops/abCOpLn.c b/ops/abCOpLn.c
new file mode 100644
index 0000000..c1593b6
--- /dev/null
+++ b/ops/abCOpLn.c
@@ -0,0 +1,55 @@
+/* 
+    abCOpLn.c
+        By: Jeremy Rand
+ */
+
+
+#include <math.h>
+#include <stdio.h>
+
+#include "abCError.h"
+#include "abCStack.h"
+
+#include "expr/abCExpr.h"
+#include "expr/abCExpReal.h"
+
+#include "ops/abCOp.h"
+#include "ops/abCOpLn.h"
+
+
+#define LN_NAME "LN"
+
+
+static void lnExecute(void);
+
+
+void abCalcOpLnInit(void)
+{
+    abCalcOpRegister(LN_NAME, lnExecute);
+}
+
+
+void lnExecute(void)
+{
+    abCalcExpr result;
+    AB_CALC_OP_ONE_ARG(LN_NAME);
+
+    if (expr->type != abCalcExprTypeReal) {
+        abCalcRaiseError(abCalcBadArgTypeError, LN_NAME);
+        return;
+    }
+
+    if (expr->u.real == 0.0) {
+        abCalcRaiseError(abCalcInfiniteResultError, LN_NAME);
+        return;
+    }
+    if (expr->u.real < 0.0) {
+        abCalcRaiseError(abCalcComplexResultError, LN_NAME);
+        return;
+    }
+
+    abCalcExprRealSet(&result, log(expr->u.real));
+
+    abCalcStackExprPop(NULL);
+    abCalcStackExprPush(&result);
+}
diff --git a/ops/abCOpLn.h b/ops/abCOpLn.h
new file mode 100644
index 0000000..adb0752
--- /dev/null
+++ b/ops/abCOpLn.h
@@ -0,0 +1,14 @@
+/* 
+    abCOpLn.h
+        By: Jeremy Rand
+ */
+
+
+#ifndef ABCOPLN_H
+#define ABCOPLN_H
+
+
+void abCalcOpLnInit(void);
+
+
+#endif
diff --git a/ops/abCOpLnp1.c b/ops/abCOpLnp1.c
new file mode 100644
index 0000000..fb5cdd9
--- /dev/null
+++ b/ops/abCOpLnp1.c
@@ -0,0 +1,55 @@
+/* 
+    abCOpLnp1.c
+        By: Jeremy Rand
+ */
+
+
+#include <math.h>
+#include <stdio.h>
+
+#include "abCError.h"
+#include "abCStack.h"
+
+#include "expr/abCExpr.h"
+#include "expr/abCExpReal.h"
+
+#include "ops/abCOp.h"
+#include "ops/abCOpLnp1.h"
+
+
+#define LNP1_NAME "LNP1"
+
+
+static void lnp1Execute(void);
+
+
+void abCalcOpLnp1Init(void)
+{
+    abCalcOpRegister(LNP1_NAME, lnp1Execute);
+}
+
+
+void lnp1Execute(void)
+{
+    abCalcExpr result;
+    AB_CALC_OP_ONE_ARG(LNP1_NAME);
+
+    if (expr->type != abCalcExprTypeReal) {
+        abCalcRaiseError(abCalcBadArgTypeError, LNP1_NAME);
+        return;
+    }
+
+    if (expr->u.real == -1.0) {
+        abCalcRaiseError(abCalcInfiniteResultError, LNP1_NAME);
+        return;
+    }
+    if (expr->u.real < -1.0) {
+        abCalcRaiseError(abCalcComplexResultError, LNP1_NAME);
+        return;
+    }
+
+    abCalcExprRealSet(&result, log1p(expr->u.real));
+
+    abCalcStackExprPop(NULL);
+    abCalcStackExprPush(&result);
+}
diff --git a/ops/abCOpLnp1.h b/ops/abCOpLnp1.h
new file mode 100644
index 0000000..7beed24
--- /dev/null
+++ b/ops/abCOpLnp1.h
@@ -0,0 +1,14 @@
+/* 
+    abCOpLnp1.h
+        By: Jeremy Rand
+ */
+
+
+#ifndef ABCOPLNP1_H
+#define ABCOPLNP1_H
+
+
+void abCalcOpLnp1Init(void);
+
+
+#endif
diff --git a/ops/abCOpLog.c b/ops/abCOpLog.c
new file mode 100644
index 0000000..0523ae3
--- /dev/null
+++ b/ops/abCOpLog.c
@@ -0,0 +1,55 @@
+/* 
+    abCOpLog.c
+        By: Jeremy Rand
+ */
+
+
+#include <math.h>
+#include <stdio.h>
+
+#include "abCError.h"
+#include "abCStack.h"
+
+#include "expr/abCExpr.h"
+#include "expr/abCExpReal.h"
+
+#include "ops/abCOp.h"
+#include "ops/abCOpLog.h"
+
+
+#define LOG_NAME "LOG"
+
+
+static void logExecute(void);
+
+
+void abCalcOpLogInit(void)
+{
+    abCalcOpRegister(LOG_NAME, logExecute);
+}
+
+
+void logExecute(void)
+{
+    abCalcExpr result;
+    AB_CALC_OP_ONE_ARG(LOG_NAME);
+
+    if (expr->type != abCalcExprTypeReal) {
+        abCalcRaiseError(abCalcBadArgTypeError, LOG_NAME);
+        return;
+    }
+
+    if (expr->u.real == 0.0) {
+        abCalcRaiseError(abCalcInfiniteResultError, LOG_NAME);
+        return;
+    }
+    if (expr->u.real < 0.0) {
+        abCalcRaiseError(abCalcComplexResultError, LOG_NAME);
+        return;
+    }
+
+    abCalcExprRealSet(&result, log10(expr->u.real));
+
+    abCalcStackExprPop(NULL);
+    abCalcStackExprPush(&result);
+}
diff --git a/ops/abCOpLog.h b/ops/abCOpLog.h
new file mode 100644
index 0000000..b05ca20
--- /dev/null
+++ b/ops/abCOpLog.h
@@ -0,0 +1,14 @@
+/* 
+    abCOpLog.h
+        By: Jeremy Rand
+ */
+
+
+#ifndef ABCOPLOG_H
+#define ABCOPLOG_H
+
+
+void abCalcOpLogInit(void);
+
+
+#endif
diff --git a/ops/abCOpPi.c b/ops/abCOpPi.c
new file mode 100644
index 0000000..859fac7
--- /dev/null
+++ b/ops/abCOpPi.c
@@ -0,0 +1,42 @@
+/* 
+    abCOpPi.c
+        By: Jeremy Rand
+ */
+
+
+#include <math.h>
+#include <stdio.h>
+
+#include "abCStack.h"
+
+#include "expr/abCExpr.h"
+#include "expr/abCExpReal.h"
+
+#include "ops/abCOp.h"
+#include "ops/abCOpPi.h"
+
+
+#define PI_NAME "PI"
+
+
+static void piExecute(void);
+
+
+void abCalcOpPiInit(void)
+{
+    abCalcOpRegister(PI_NAME, piExecute);
+}
+
+
+void piExecute(void)
+{
+    abCalcExpr result;
+
+#ifdef ABCALC_GSOS
+    abCalcExprRealSet(&result, 2.0 * asin(1.0));
+#else
+    abCalcExprRealSet(&result, M_PI);
+#endif
+
+    abCalcStackExprPush(&result);
+}
diff --git a/ops/abCOpPi.h b/ops/abCOpPi.h
new file mode 100644
index 0000000..5cde26c
--- /dev/null
+++ b/ops/abCOpPi.h
@@ -0,0 +1,14 @@
+/* 
+    abCOpPi.h
+        By: Jeremy Rand
+ */
+
+
+#ifndef ABCOPPI_H
+#define ABCOPPI_H
+
+
+void abCalcOpPiInit(void);
+
+
+#endif
diff --git a/ops/abCOpSin.c b/ops/abCOpSin.c
new file mode 100644
index 0000000..efe3cf2
--- /dev/null
+++ b/ops/abCOpSin.c
@@ -0,0 +1,46 @@
+/* 
+    abCOpSin.c
+        By: Jeremy Rand
+ */
+
+
+#include <math.h>
+#include <stdio.h>
+
+#include "abCError.h"
+#include "abCStack.h"
+
+#include "expr/abCExpr.h"
+#include "expr/abCExpReal.h"
+
+#include "ops/abCOp.h"
+#include "ops/abCOpSin.h"
+
+
+#define SIN_NAME "SIN"
+
+
+static void sinExecute(void);
+
+
+void abCalcOpSinInit(void)
+{
+    abCalcOpRegister(SIN_NAME, sinExecute);
+}
+
+
+void sinExecute(void)
+{
+    abCalcExpr result;
+    AB_CALC_OP_ONE_ARG(SIN_NAME);
+
+    if (expr->type != abCalcExprTypeReal) {
+        abCalcRaiseError(abCalcBadArgTypeError, SIN_NAME);
+        return;
+    }
+
+    abCalcExprRealSet(&result, sin(expr->u.real));
+
+    abCalcStackExprPop(NULL);
+    abCalcStackExprPush(&result);
+}
diff --git a/ops/abCOpSin.h b/ops/abCOpSin.h
new file mode 100644
index 0000000..e6ae3e2
--- /dev/null
+++ b/ops/abCOpSin.h
@@ -0,0 +1,14 @@
+/* 
+    abCOpSin.h
+        By: Jeremy Rand
+ */
+
+
+#ifndef ABCOPSIN_H
+#define ABCOPSIN_H
+
+
+void abCalcOpSinInit(void);
+
+
+#endif
diff --git a/ops/abCOpSinh.c b/ops/abCOpSinh.c
new file mode 100644
index 0000000..42ee78a
--- /dev/null
+++ b/ops/abCOpSinh.c
@@ -0,0 +1,46 @@
+/* 
+    abCOpSinh.c
+        By: Jeremy Rand
+ */
+
+
+#include <math.h>
+#include <stdio.h>
+
+#include "abCError.h"
+#include "abCStack.h"
+
+#include "expr/abCExpr.h"
+#include "expr/abCExpReal.h"
+
+#include "ops/abCOp.h"
+#include "ops/abCOpSinh.h"
+
+
+#define SINH_NAME "SINH"
+
+
+static void sinhExecute(void);
+
+
+void abCalcOpSinhInit(void)
+{
+    abCalcOpRegister(SINH_NAME, sinhExecute);
+}
+
+
+void sinhExecute(void)
+{
+    abCalcExpr result;
+    AB_CALC_OP_ONE_ARG(SINH_NAME);
+
+    if (expr->type != abCalcExprTypeReal) {
+        abCalcRaiseError(abCalcBadArgTypeError, SINH_NAME);
+        return;
+    }
+
+    abCalcExprRealSet(&result, sinh(expr->u.real));
+
+    abCalcStackExprPop(NULL);
+    abCalcStackExprPush(&result);
+}
diff --git a/ops/abCOpSinh.h b/ops/abCOpSinh.h
new file mode 100644
index 0000000..dab0958
--- /dev/null
+++ b/ops/abCOpSinh.h
@@ -0,0 +1,14 @@
+/* 
+    abCOpSinh.h
+        By: Jeremy Rand
+ */
+
+
+#ifndef ABCOPSINH_H
+#define ABCOPSINH_H
+
+
+void abCalcOpSinhInit(void);
+
+
+#endif
diff --git a/ops/abCOpSq.c b/ops/abCOpSq.c
new file mode 100644
index 0000000..4b4e7f0
--- /dev/null
+++ b/ops/abCOpSq.c
@@ -0,0 +1,46 @@
+/* 
+    abCOpSq.c
+        By: Jeremy Rand
+ */
+
+
+#include <math.h>
+#include <stdio.h>
+
+#include "abCError.h"
+#include "abCStack.h"
+
+#include "expr/abCExpr.h"
+#include "expr/abCExpReal.h"
+
+#include "ops/abCOp.h"
+#include "ops/abCOpSq.h"
+
+
+#define SQ_NAME "SQ"
+
+
+static void sqExecute(void);
+
+
+void abCalcOpSqInit(void)
+{
+    abCalcOpRegister(SQ_NAME, sqExecute);
+}
+
+
+void sqExecute(void)
+{
+    abCalcExpr result;
+    AB_CALC_OP_ONE_ARG(SQ_NAME);
+
+    if (expr->type != abCalcExprTypeReal) {
+        abCalcRaiseError(abCalcBadArgTypeError, SQ_NAME);
+        return;
+    }
+
+    abCalcExprRealSet(&result, expr->u.real * expr->u.real);
+
+    abCalcStackExprPop(NULL);
+    abCalcStackExprPush(&result);
+}
diff --git a/ops/abCOpSq.h b/ops/abCOpSq.h
new file mode 100644
index 0000000..41ff873
--- /dev/null
+++ b/ops/abCOpSq.h
@@ -0,0 +1,14 @@
+/* 
+    abCOpSq.h
+        By: Jeremy Rand
+ */
+
+
+#ifndef ABCOPSQ_H
+#define ABCOPSQ_H
+
+
+void abCalcOpSqInit(void);
+
+
+#endif
diff --git a/ops/abCOpSqrt.c b/ops/abCOpSqrt.c
new file mode 100644
index 0000000..1cbea82
--- /dev/null
+++ b/ops/abCOpSqrt.c
@@ -0,0 +1,46 @@
+/* 
+    abCOpSqrt.c
+        By: Jeremy Rand
+ */
+
+
+#include <math.h>
+#include <stdio.h>
+
+#include "abCError.h"
+#include "abCStack.h"
+
+#include "expr/abCExpr.h"
+#include "expr/abCExpReal.h"
+
+#include "ops/abCOp.h"
+#include "ops/abCOpSqrt.h"
+
+
+#define SQRT_NAME "SQRT"
+
+
+static void sqrtExecute(void);
+
+
+void abCalcOpSqrtInit(void)
+{
+    abCalcOpRegister(SQRT_NAME, sqrtExecute);
+}
+
+
+void sqrtExecute(void)
+{
+    abCalcExpr result;
+    AB_CALC_OP_ONE_ARG(SQRT_NAME);
+
+    if (expr->type != abCalcExprTypeReal) {
+        abCalcRaiseError(abCalcBadArgTypeError, SQRT_NAME);
+        return;
+    }
+
+    abCalcExprRealSet(&result, sqrt(expr->u.real));
+
+    abCalcStackExprPop(NULL);
+    abCalcStackExprPush(&result);
+}
diff --git a/ops/abCOpSqrt.h b/ops/abCOpSqrt.h
new file mode 100644
index 0000000..9b518b5
--- /dev/null
+++ b/ops/abCOpSqrt.h
@@ -0,0 +1,14 @@
+/* 
+    abCOpSqrt.h
+        By: Jeremy Rand
+ */
+
+
+#ifndef ABCOPSQRT_H
+#define ABCOPSQRT_H
+
+
+void abCalcOpSqrtInit(void);
+
+
+#endif
diff --git a/ops/abCOpSwap.c b/ops/abCOpSwap.c
new file mode 100644
index 0000000..8c1cee9
--- /dev/null
+++ b/ops/abCOpSwap.c
@@ -0,0 +1,45 @@
+/* 
+    abCOpSwap.c
+        By: Jeremy Rand
+ */
+
+
+#include <math.h>
+#include <stdio.h>
+#include <string.h>
+
+#include "abCError.h"
+#include "abCStack.h"
+
+#include "expr/abCExpr.h"
+
+#include "ops/abCOp.h"
+#include "ops/abCOpSwap.h"
+
+
+#define SWAP_NAME "SWAP"
+
+
+static void swapExecute(void);
+
+
+void abCalcOpSwapInit(void)
+{
+    abCalcOpRegister(SWAP_NAME, swapExecute);
+}
+
+
+void swapExecute(void)
+{
+    abCalcExpr result1;
+    abCalcExpr result2;
+    AB_CALC_OP_TWO_ARGS(SWAP_NAME);
+
+    memcpy(&result2, expr2, sizeof(result2));
+    memcpy(&result1, expr1, sizeof(result1));
+
+    abCalcStackExprPop(NULL);
+    abCalcStackExprPop(NULL);
+    abCalcStackExprPush(&result1);
+    abCalcStackExprPush(&result2);
+}
diff --git a/ops/abCOpSwap.h b/ops/abCOpSwap.h
new file mode 100644
index 0000000..1edff5f
--- /dev/null
+++ b/ops/abCOpSwap.h
@@ -0,0 +1,14 @@
+/* 
+    abCOpSwap.h
+        By: Jeremy Rand
+ */
+
+
+#ifndef ABCOPSWAP_H
+#define ABCOPSWAP_H
+
+
+void abCalcOpSwapInit(void);
+
+
+#endif
diff --git a/ops/abCOpTan.c b/ops/abCOpTan.c
new file mode 100644
index 0000000..a8f0f76
--- /dev/null
+++ b/ops/abCOpTan.c
@@ -0,0 +1,46 @@
+/* 
+    abCOpTan.c
+        By: Jeremy Rand
+ */
+
+
+#include <math.h>
+#include <stdio.h>
+
+#include "abCError.h"
+#include "abCStack.h"
+
+#include "expr/abCExpr.h"
+#include "expr/abCExpReal.h"
+
+#include "ops/abCOp.h"
+#include "ops/abCOpTan.h"
+
+
+#define TAN_NAME "TAN"
+
+
+static void tanExecute(void);
+
+
+void abCalcOpTanInit(void)
+{
+    abCalcOpRegister(TAN_NAME, tanExecute);
+}
+
+
+void tanExecute(void)
+{
+    abCalcExpr result;
+    AB_CALC_OP_ONE_ARG(TAN_NAME);
+
+    if (expr->type != abCalcExprTypeReal) {
+        abCalcRaiseError(abCalcBadArgTypeError, TAN_NAME);
+        return;
+    }
+
+    abCalcExprRealSet(&result, tan(expr->u.real));
+
+    abCalcStackExprPop(NULL);
+    abCalcStackExprPush(&result);
+}
diff --git a/ops/abCOpTan.h b/ops/abCOpTan.h
new file mode 100644
index 0000000..78d5e3f
--- /dev/null
+++ b/ops/abCOpTan.h
@@ -0,0 +1,14 @@
+/* 
+    abCOpTan.h
+        By: Jeremy Rand
+ */
+
+
+#ifndef ABCOPTAN_H
+#define ABCOPTAN_H
+
+
+void abCalcOpTanInit(void);
+
+
+#endif
diff --git a/ops/abCOpTanh.c b/ops/abCOpTanh.c
new file mode 100644
index 0000000..d9c0224
--- /dev/null
+++ b/ops/abCOpTanh.c
@@ -0,0 +1,46 @@
+/* 
+    abCOpTanh.c
+        By: Jeremy Rand
+ */
+
+
+#include <math.h>
+#include <stdio.h>
+
+#include "abCError.h"
+#include "abCStack.h"
+
+#include "expr/abCExpr.h"
+#include "expr/abCExpReal.h"
+
+#include "ops/abCOp.h"
+#include "ops/abCOpTanh.h"
+
+
+#define TANH_NAME "TANH"
+
+
+static void tanhExecute(void);
+
+
+void abCalcOpTanhInit(void)
+{
+    abCalcOpRegister(TANH_NAME, tanhExecute);
+}
+
+
+void tanhExecute(void)
+{
+    abCalcExpr result;
+    AB_CALC_OP_ONE_ARG(TANH_NAME);
+
+    if (expr->type != abCalcExprTypeReal) {
+        abCalcRaiseError(abCalcBadArgTypeError, TANH_NAME);
+        return;
+    }
+
+    abCalcExprRealSet(&result, tanh(expr->u.real));
+
+    abCalcStackExprPop(NULL);
+    abCalcStackExprPush(&result);
+}
diff --git a/ops/abCOpTanh.h b/ops/abCOpTanh.h
new file mode 100644
index 0000000..47046e9
--- /dev/null
+++ b/ops/abCOpTanh.h
@@ -0,0 +1,14 @@
+/* 
+    abCOpTanh.h
+        By: Jeremy Rand
+ */
+
+
+#ifndef ABCOPTANH_H
+#define ABCOPTANH_H
+
+
+void abCalcOpTanhInit(void);
+
+
+#endif