Now that you mention it, at least on Wintel compiler vendors did not preserve the definition of `int` during the transition from 16-bit to 32-bit. I started in

Now that you mention it, at least on Wintel compiler vendors did not preserve the definition of `int` during the transition from 16-bit to 32-bit. I started in the 386 era myself so I have no frame of reference for porting code from 286. But Windows famously retains a lot of 16-bit heritage, such as defining `DWORD` as 32 bits, making it now a double-anachronism. I wonder if the decision to model today’s popular 64-bit processors as LP64 is related to not wanting to go through that again. Edit: of course, I completely forgot that Windows chose LLP64, not LP64, for x86_64 and AArch64. Raymond Chen has commented on this [1], but only as an addendum to reasons given elsewhere which have since bitrotted. [1]: https://devblogs.microsoft.com/oldnewthing/20050131-00/?p=36563 https://devblogs.microsoft.com/oldnewthing/20050131-00/?p=36...