or [Start]. Right-click [Computer] or [My Computer] and choose [Properties].
2. Check [System type] or [System].
(Windows XP)
If you are using 64-bit version of Windows XP, "x64" is displayed in the System Properties. If you are using 32-bit version of Windows XP, the bit is not displayed.
For Mac
1. Choose [About This Mac] from the Apple menu.
2. The version of your Mac is displayed as shown below.