Index: Common.h
===================================================================
diff -u -rd622dc6b4ac5023f1510cc993c71281f952f86e5 -r77b29084a85f241dd6c83ef838e076bac666b11c
--- Common.h	(.../Common.h)	(revision d622dc6b4ac5023f1510cc993c71281f952f86e5)
+++ Common.h	(.../Common.h)	(revision 77b29084a85f241dd6c83ef838e076bac666b11c)
@@ -8,7 +8,7 @@
 * @file    Common.h
 *
 * @author  (last)      Dara Navaei
-* @date    (last)      03-Aug-2022
+* @date    (last)      21-Sep-2022
 *
 * @author  (original)  Sean
 * @date    (original)  04-Feb-2020
@@ -34,7 +34,7 @@
 
 typedef float                    F32;               ///< 32-bit floating point type
 typedef double                   F64;               ///< 64-bit floating point type
-typedef unsigned long long       U64;               ///< 64-bit unsigned integer type
+typedef long long                S64;               ///< 64-bit signed integer type
 typedef unsigned int             U32;               ///< 32-bit unsigned integer type
 typedef int                      S32;               ///< 32-bit signed integer type
 typedef unsigned short           U16;               ///< 16-bit unsigned integer type
@@ -110,7 +110,7 @@
 #define ML_PER_LITER                    1000        ///< Number of milliliters in a liter
 #define MA_PER_AMP                      1000        ///< Number of milliamps in an amp
 #define MS_PER_SECOND                   1000        ///< Number of milliseconds in a second
-#define US_PER_SECOND                   1000000     ///< Number of microseconds in a millisecond
+#define US_PER_SECOND                   1000000     ///< Number of microseconds in a second
 #define SEC_PER_MIN                     60          ///< Number of seconds in a minute
 #define FRACTION_TO_PERCENT_FACTOR      100.0F      ///< Percentage factor (100)
 #define MIN_PER_HOUR                    60          ///< Number of minutes in an hour