How do you determine if Windows 2003 server install is 32bit or 64bit

OK, this is probably really stupid, but how do you tell if a Windows 2003 install is 32bit or 64bit.  I have a client that swares the install is 64bit, but I don't believe them.  Problem is, I can't find any documentation either way.  Is there something in computer management, etc. that would tell me what bit version this install is?

Thanks for the help.  500 points, b/c I need quick answers.
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adsnetcurveAsked:
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tonyteriConnect With a Mentor Commented:
Start, Accessories, System Tools, System Infoirmation

/TT
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CarlWarnerCommented:
Registry Changes in Windows x64 Edition-based operating system
http://support.microsoft.com/default.aspx?scid=kb;en-us;896459
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CiaranDolanCommented:
It's 32bit - 64bit has come out too recently to be deployed in anger. They probably think it's 64bit because it's running on Xeon processors which have support for some 64bit instructions.
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CarlWarnerCommented:
rofl
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