diff --git a/API/Z80.h b/API/Z80.h
index 1705180..b323d66 100644
--- a/API/Z80.h
+++ b/API/Z80.h
@@ -28,7 +28,7 @@
   *
   * @details The Z80 library implements a fast, small and accurate emulator
   * of the Zilog Z80. It emulates all that is known to date about this CPU,
-  * including the undocumented behaviour, MEMPTR, Q and the special RESET.
+  * including the undocumented behaviors, MEMPTR, Q and the special RESET.
   *
   * @version 0.2
   * @date 2022-05-29
diff --git a/README b/README
index 4e2d692..8806f59 100644
--- a/README
+++ b/README
@@ -28,7 +28,7 @@
 
 The Z80 library implements a fast, small and accurate emulator of the Zilog Z80.
 It emulates all that is known to date about this CPU, including the undocumented
-behaviour, MEMPTR, Q and the special RESET. It also has the honor of having been
+behaviors, MEMPTR, Q and the special RESET. It also has the honor of having been
 the first open source project to provide full emulation of the interrupt mode 0.
 
 The source code is written in ANSI C for maximum portability and is extensively
@@ -306,4 +306,4 @@ with this library. If not, see <http://www.gnu.org/licenses/>.
 
 
 --------------------------------------------------------------------------------
-Last update: 2022-07-16                                               README EOF
+Last update: 2022-07-28                                               README EOF
diff --git a/README.md b/README.md
index f6d6708..24486cb 100644
--- a/README.md
+++ b/README.md
@@ -14,7 +14,7 @@
 
 # Introduction
 
-The [Z80 library](https://zxe.io/software/Z80) implements a fast, small and accurate [emulator](https://en.wikipedia.org/wiki/Emulator) of the [Zilog Z80](https://en.wikipedia.org/wiki/Zilog_Z80). It emulates all that is known to date about this CPU, including the undocumented behaviour, [MEMPTR](https://zxpress.ru/zxnet/zxnet.pc/5909), [Q](https://worldofspectrum.org/forums/discussion/41704) and the [special RESET](http://www.primrosebank.net/computers/z80/z80_special_reset.htm). It also has the honor of having been the first open source project to provide full emulation of the interrupt mode 0.
+The [Z80 library](https://zxe.io/software/Z80) implements a fast, small and accurate [emulator](https://en.wikipedia.org/wiki/Emulator) of the [Zilog Z80](https://en.wikipedia.org/wiki/Zilog_Z80). It emulates all that is known to date about this CPU, including the undocumented behaviors, [MEMPTR](https://zxpress.ru/zxnet/zxnet.pc/5909), [Q](https://worldofspectrum.org/forums/discussion/41704) and the [special RESET](http://www.primrosebank.net/computers/z80/z80_special_reset.htm). It also has the honor of having been the first open source project to provide full emulation of the interrupt mode 0.
 
 The source code is written in [ANSI C](https://en.wikipedia.org/wiki/ANSI_C) for maximum portability and is extensively commented. The aim has been to write a well-structured, easy to understand piece of software; something solid and elegant that can stand the test of time with no need for major changes.