Talk (software)
talk is a Unix text chat program, originally allowing messaging only between the users logged on to one multi-user computer—but later extended to allow chat to users on other systems. Although largely superseded by IRC and other modern systems, it is still included with most Unix-like systems today, including Linux, BSD systems including macOS. == History == Similar facilities existed on earlier systems such as Multics, CTSS, PLATO, and NLS. Early versions of talk did not separate text from each user.