Detect whether Office is 32bit or 64bit via the registry

Question

Now that Office also comes in a 64bit install, where in the registry do you find out if the version of Office installed is 32bit or 64bit?

Answer 1

If one wants to know only what bit number an installed version of Office 2010 is, then in any application of Office 2010, just click on File, then on Help. Information about version number will be listed, and next to that, in parentheses, will be either (32-bit) or (64-bit).