diff --git a/src/com/bytezone/diskbrowser/visicalc/AbstractValue.java b/src/com/bytezone/diskbrowser/visicalc/AbstractValue.java
index ca51db3..cf0972c 100644
--- a/src/com/bytezone/diskbrowser/visicalc/AbstractValue.java
+++ b/src/com/bytezone/diskbrowser/visicalc/AbstractValue.java
@@ -65,6 +65,12 @@ public abstract class AbstractValue implements Value
   {
   }
 
+  @Override
+  public boolean isBoolean ()
+  {
+    return false;
+  }
+
   // for debugging
   String getValueText (int depth)
   {
diff --git a/src/com/bytezone/diskbrowser/visicalc/And.java b/src/com/bytezone/diskbrowser/visicalc/And.java
index bc8092a..6ae6dc2 100644
--- a/src/com/bytezone/diskbrowser/visicalc/And.java
+++ b/src/com/bytezone/diskbrowser/visicalc/And.java
@@ -39,4 +39,16 @@ class And extends Function
     }
     value = 1;
   }
+
+  @Override
+  public boolean isBoolean ()
+  {
+    return true;
+  }
+
+  @Override
+  public String getText ()
+  {
+    return value == 0 ? "FALSE" : "TRUE";
+  }
 }
\ No newline at end of file
diff --git a/src/com/bytezone/diskbrowser/visicalc/Cell.java b/src/com/bytezone/diskbrowser/visicalc/Cell.java
index 2f82174..f2ba522 100644
--- a/src/com/bytezone/diskbrowser/visicalc/Cell.java
+++ b/src/com/bytezone/diskbrowser/visicalc/Cell.java
@@ -182,6 +182,13 @@ class Cell extends AbstractValue implements Comparable<Cell>
           return " " + Format.justify (value.getText (), colWidth - 1, fmtChar);
         }
 
+        if (value.isBoolean ())     // consider ValueType of BOOLEAN
+        {
+          if (fmtChar != 'L')
+            fmtChar = 'R';
+          return Format.justify (value.getText (), colWidth, fmtChar);
+        }
+
         if (colWidth == 1)
           return ".";
         return " " + Format.format (value, fmtChar, colWidth - 1);
diff --git a/src/com/bytezone/diskbrowser/visicalc/False.java b/src/com/bytezone/diskbrowser/visicalc/False.java
index e475d38..9d93d16 100644
--- a/src/com/bytezone/diskbrowser/visicalc/False.java
+++ b/src/com/bytezone/diskbrowser/visicalc/False.java
@@ -7,5 +7,18 @@ public class False extends Function
     super (parent, cell, text);
 
     value = 0;
+    valueType = ValueType.VALUE;
+  }
+
+  @Override
+  public boolean isBoolean ()
+  {
+    return true;
+  }
+
+  @Override
+  public String getText ()
+  {
+    return value == 0 ? "FALSE" : "TRUE";
   }
 }
\ No newline at end of file
diff --git a/src/com/bytezone/diskbrowser/visicalc/Function.java b/src/com/bytezone/diskbrowser/visicalc/Function.java
index 1712038..7eb8db2 100644
--- a/src/com/bytezone/diskbrowser/visicalc/Function.java
+++ b/src/com/bytezone/diskbrowser/visicalc/Function.java
@@ -7,7 +7,7 @@ abstract class Function extends AbstractValue implements Iterable<Value>
   static final String[] functionList =
       { "@ABS(", "@ACOS(", "@AND(", "@ASIN(", "@ATAN(", "@AVERAGE(", "@COUNT(",
         "@CHOOSE(", "@COS(", "@ERROR", "@EXP(", "@FALSE", "@IF(", "@INT(", "@ISERROR(",
-        "@ISNA(", "@LOG10(", "@LOOKUP(", "@LN(", "@MIN(", "@MAX(", "@NA", "@NPV", "@OR(",
+        "@ISNA(", "@LOG10(", "@LOOKUP(", "@LN(", "@MIN(", "@MAX(", "@NA", "@NPV(", "@OR(",
         "@PI", "@SIN(", "@SUM(", "@SQRT(", "@TAN(", "@TRUE" };
 
   protected final Sheet parent;
diff --git a/src/com/bytezone/diskbrowser/visicalc/Or.java b/src/com/bytezone/diskbrowser/visicalc/Or.java
index 7fe6613..24d5f91 100644
--- a/src/com/bytezone/diskbrowser/visicalc/Or.java
+++ b/src/com/bytezone/diskbrowser/visicalc/Or.java
@@ -39,4 +39,16 @@ class Or extends Function
     }
     value = 0;
   }
+
+  @Override
+  public boolean isBoolean ()
+  {
+    return true;
+  }
+
+  @Override
+  public String getText ()
+  {
+    return value == 0 ? "FALSE" : "TRUE";
+  }
 }
\ No newline at end of file
diff --git a/src/com/bytezone/diskbrowser/visicalc/True.java b/src/com/bytezone/diskbrowser/visicalc/True.java
index 81fe490..7419ff5 100644
--- a/src/com/bytezone/diskbrowser/visicalc/True.java
+++ b/src/com/bytezone/diskbrowser/visicalc/True.java
@@ -7,5 +7,18 @@ public class True extends Function
     super (parent, cell, text);
 
     value = 1;
+    valueType = ValueType.VALUE;
+  }
+
+  @Override
+  public boolean isBoolean ()
+  {
+    return true;
+  }
+
+  @Override
+  public String getText ()
+  {
+    return value == 0 ? "FALSE" : "TRUE";
   }
 }
\ No newline at end of file
diff --git a/src/com/bytezone/diskbrowser/visicalc/Value.java b/src/com/bytezone/diskbrowser/visicalc/Value.java
index 630b8bf..ae6133b 100644
--- a/src/com/bytezone/diskbrowser/visicalc/Value.java
+++ b/src/com/bytezone/diskbrowser/visicalc/Value.java
@@ -20,4 +20,6 @@ interface Value
   public String getTypeText ();       // Number/Function/Expression etc
 
   public boolean isVolatile ();
+
+  public boolean isBoolean ();
 }
\ No newline at end of file