speak

was a Unix utility that used a predefined set of rules to turn a file of English text into phoneme data compatible with a Federal Screw Works (later Votrax) model VS4 "Votrax" Speech Synthesizer. It was first included in Unix v3 and possibly later ones, with the OS-end support files and help files persisting until v6. As of late 2011, the original source code for , and portions of speak.m (which is generated from speak.v) were discovered. At least three versions of the man page are known to still exist.