In computing, the Blit is a programmable bitmap graphics terminal designed by Rob Pike and Bart Locanthi of Bell Labs in 1982. Acting initially as a "glass Teletype" ASCII terminal, after logging into a Unix system a window manager could be downloaded, with each window attached as a separate pseudo-terminal on the host system (multiplexing the serial-line connection). Each window initially ran a terminal emulator, which could be replaced by a downloaded interactive graphical application.