A. All current versions of Windows 2000 and Windows NT are 32-bit OSs (although Microsoft has made some enhancements to let Win2K and NT access more than 4GB of memory when used with an Intel Xeon processor, providing access to 64GB of memory).
Windows 2002 will be the first Windows version to support a true 64-bit processor, such as the Intel Itanium. Even if the OS fully supports a 64-bit processor, the applications will also need to be written to use the new abilities (e.g., 64GB of memory), so the move to 64-bit will be a major step.
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