32 bit vs. 64 bit apps

How do I know if an application is 32 bit vs. 64 bit running on a Windows 7 64 bit OS

Double-click on Computer, double-click on C: drive and double-click Program Files. That folder holds your 64 bit programs. Program Files (x86) holds the 32 bit programs.

Run the application and check it's name in the Processes tab in Task Manager; all the ones with an *32 at the end are 32 bit