diff --git a/LICENSE b/LICENSE
new file mode 100644
index 0000000..37bcdf1
--- /dev/null
+++ b/LICENSE
@@ -0,0 +1,21 @@
+The MIT License (MIT)
+
+Copyright (c) 2019 Jeremy Rand
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
diff --git a/abCalc.xcodeproj/project.pbxproj b/abCalc.xcodeproj/project.pbxproj
index 626ce12..4c6e68f 100644
--- a/abCalc.xcodeproj/project.pbxproj
+++ b/abCalc.xcodeproj/project.pbxproj
@@ -48,6 +48,7 @@
 /* End PBXCopyFilesBuildPhase section */
 
 /* Begin PBXFileReference section */
+		9D30A37622FBC1EA00A4DAFA /* LICENSE */ = {isa = PBXFileReference; lastKnownFileType = text; path = LICENSE; sourceTree = "<group>"; };
 		9DFA299A22FBB4E500CFBC74 /* abCalc */ = {isa = PBXFileReference; explicitFileType = "compiled.mach-o.executable"; includeInIndex = 0; path = abCalc; sourceTree = BUILT_PRODUCTS_DIR; };
 		9DFA299D22FBB4E500CFBC74 /* abCalc.2mg */ = {isa = PBXFileReference; explicitFileType = "compiled.mach-o.executable"; includeInIndex = 0; path = abCalc.2mg; sourceTree = BUILT_PRODUCTS_DIR; };
 		9DFA29A222FBB4E500CFBC74 /* doNotBuild */ = {isa = PBXFileReference; explicitFileType = "compiled.mach-o.executable"; includeInIndex = 0; path = doNotBuild; sourceTree = BUILT_PRODUCTS_DIR; };
@@ -191,6 +192,7 @@
 			isa = PBXGroup;
 			children = (
 				9DFA29CF22FBB50200CFBC74 /* README.md */,
+				9D30A37622FBC1EA00A4DAFA /* LICENSE */,
 				9DFA29A322FBB4E500CFBC74 /* abCalc */,
 				9DFA299B22FBB4E500CFBC74 /* Products */,
 			);
diff --git a/abCalc.xcodeproj/project.xcworkspace/xcuserdata/jrand.xcuserdatad/UserInterfaceState.xcuserstate b/abCalc.xcodeproj/project.xcworkspace/xcuserdata/jrand.xcuserdatad/UserInterfaceState.xcuserstate
index 824718f..2f9c2a7 100644
Binary files a/abCalc.xcodeproj/project.xcworkspace/xcuserdata/jrand.xcuserdatad/UserInterfaceState.xcuserstate and b/abCalc.xcodeproj/project.xcworkspace/xcuserdata/jrand.xcuserdatad/UserInterfaceState.xcuserstate differ