 ", "and Chronology of Personal Computers".During the lifetime of the 8-bit series, Atari released a large number of peripherals including cassette tape drives, 5.25-inch floppy drives, printers, modems, a touch tablet, and an 80-column display module.Atari's peripherals used the proprietary Atari SIO port, which allowed them to be daisy chained together into a single string.