IBM 3270 and IBM 5250 terminals displaying predefined forms using the 3270 or 5250 protocol to communicate with the host.
IBM 3270-based terminals used with IBM mainframe computers are an example of synchronous terminals.
Anderson was sitting behind an IBM terminal, chewing on the end of a chopstick.
The IBM 3270 terminals from the 1970s also worked with "forms" (actually screens) that needed to be completed leading to delays and disturbing breaks in the work.
Later, support was added by user groups for 2741 terminals with the "break feature" and for IBM 1050 terminals.
During the 1960s light pens were common on graphics terminals such as the IBM 2250, and were also available for the IBM 3270 text-only terminal.
It used 3790 hardware but its software made it a dedicated shared-logic word-processing system which could support a dozen or more word-processing IBM 3732 terminals.
LU7 provides for sessions with IBM 5250 terminals.
Each Workstation Controller could interface up to 32 IBM 3270 terminals / printers.
A similar device, the 2770, announced in 1969, "was said to surpass all other IBM terminals in the variety of available input-output devices."
