From https://stackoverflow.com/a/2909772 https://stackoverflow.com/a/2909772 > in this listing of man pages from Third Edition Unix (1973) collected by Dennis

From https://stackoverflow.com/a/2909772 https://stackoverflow.com/a/2909772 > in this listing of man pages from Third Edition Unix (1973) collected by Dennis Ritchie himself, it does contain the line: > > atoi(III): convert ASCII to integer > In fact, even the first edition Unix (ca 1971) man pages list atoi as meaning Ascii to Integer. It's also in the FreeBSD [1], NetBSD [2] and OpenBSD [3] atoi man pages. [1]: https://man.freebsd.org/cgi/man.cgi?query=atoi&sektion=3 https://man.freebsd.org/cgi/man.cgi?query=atoi&sektion=3 [2]: https://man.netbsd.org/atoi.3 https://man.netbsd.org/atoi.3 [3]: https://man.openbsd.org/atoi.3 https://man.openbsd.org/atoi.3