The IBM 3101 ASCII Display Station, and IBM's subsequent products, the 3151/315X and 3161/316X, are display terminals with asynchronous serial communication (start-stop signaling) that were used with a variety of IBM and non-IBM computers during the 1980s–90s, especially the data processing terminals on non-IBM minicomputers, IBM Series/1 and IBM AIX computers.

The IBM 3101 ASCII Display Station appeared in 1979. It featured:

Unusually for IBM's practices at the time, it also:

The IBM 3101 was used with a variety of IBM and non-IBM computers. As an asynchronous communication display, it competed with products from Digital Equipment Corporation (e.g. VT100), Wyse Technology (e.g. 50/60/70), Applied Digital Data Systems (e.g. ADDS Viewpoint) and others. It was often used as a data processing terminal on non-IBM minicomputers and the IBM Series/1.

The IBM 3102 dot-matrix printer used thermal-paper print technology, and could be attached to the IBM 3101's auxiliary port. It supported 80 5x7 dot-matrix characters per line, 6 lines per inch, and output 40 characters per second.

The IBM 3161/3163 ASCII Display Stations became available in 1985 and featured:

The IBM 3164 Color ASCII Display Station, available in 1986, featured a 14-inch green, amber or white monochrome CRT display.

The IBM 3151 ASCII Display Station became available in 1987, and included: