Perhaps kind of an early standard (as important project) was the Linux kernel introducing those names: -> https://github.com/torvalds/linux/blob/master/tools/include/linux/types.h   They were introduced with 1.1.67 (in November 1994) long before Posix introduced uint8_t & Co.: -> https://elixir.bootlin.com/linux/1.1.67/source/include/asm-i386/types.h     [history: The very early kernel versions used different naming like u_short and ushort without explicit width. -> https://github.com/kalamangga-net/linux-1.0/blob/master/include/linux/types.h ]     -----Ursprüngliche Nachricht----- Von:Thiago Macieira via Std-Proposals <std-proposals_at_[hidden]> Gesendet:Mi 02.07.2025 15:05 Betreff:Re: [std-proposals] Shorter fixed-width integer types An:std-proposals_at_[hidden]; CC:Thiago Macieira <thiago_at_[hidden]>; On Wednesday, 2 July 2025 00:39:33 Pacific Daylight Time Andrey Semashev via Std-Proposals wrote: > I'd like to note that (u)intN_t reflect POSIX and C types, but I don't > think the proposed shorter alternatives are defined in any relevant > standard. And in the absence of namespaces in C, it's rather unlikely the shorter forms will be added to those standards. -- Thiago Macieira - thiago (AT) macieira.info - thiago (AT) kde.org  Principal Engineer - Intel Platform & System Engineering -- Std-Proposals mailing list Std-Proposals_at_[hidden] https://lists.isocpp.org/mailman/listinfo.cgi/std-proposals