64-bit computing is replacing 32-bit, mainly because 64-bit enables faster hardware and software. Here's the rundown on the ongoing 32-bit vs. 64-bit debate.

Assuming the software is designed correctly, porting form 32-bit to 64-bit should be simple. Simple like you don't have to change anything. 32-bit programs would just ignore half of each register ...

Your new computer has a 64-bit processor, but your software probably is still 32-bit. Why haven't software developers done more about it?

More and more frequently, users are installing the 64-bit version of their operating system of choice over the less capable 32-bit version.

One of the more common questions I hear about Vista is which bit version of Windows Vista should one get. Do we go with x86 32 bit edition or x64 64 bit edition?

Mozilla engineers have decided that starting with Firefox 56 they will silently and forcibly auto-upgrade some users of 32-bit Firefox to 64-bit versions.