From the General tab, look at the Windows XP version name listed under System. If the version name contains the text "x64 Edition", your computer has a 64-bit version of Windows XP. If "x64 Edition" is not shown, your computer has a 32-bit version of Windows XP.
32-Bit versus 64-Bit Versions of Windows 8.1 - dummies If you’ve settled on, oh, Windows 8.1 as your operating system of choice, you aren’t off the hook yet. You need to decide whether you want the 32-bit flavor or the 64-bit flavor of Windows 8.1. (Similarly, Windows 8.1 Pro and Enterprise are available in a 32-bit model and a 64-bit model.) Although the 32-bit […] Why 32-bit Office is Recommended on 64-bit Windows Aug 23, 2019 Why it matters whether your Windows is 32-bit or 64-bit Aug 04, 2016 What Is the Difference Between 32 Bit and 64 Bit (x86 vs x64)
32-Bit vs. 64-Bit OSes: What's the Difference? | PCMag
Oct 22, 2019 Choose between the 64-bit or 32-bit version of Office If you're still not sure which version, 32-bit or 64-bit is a better choice for you, see the section below. Reasons to choose the 64-bit version. Computers running 64-bit versions of Windows generally have more resources such as processing power and memory, than their 32-bit predecessors. How to Determine If You Have a 32-bit or 64-bit CPU
How to Tell if Your Mac is 32-bit or 64-bit - The Mac Observer
Feb 24, 2019 Performance - 32 Bit Vs 64 Bit - Microsoft Community Nov 21, 2015