IBM 402 Alphabetic Accounting Machine

The IBM 402 and IBM 403 Accounting Machines were tabulating machines introduced by IBM in the late 1940s. The 402 could read punched cards at a speed of up to 150 cards per minute, while printing data at a speed of up to 100 lines per minute with 43 alpha-numerical type bars and 45 numerical type bars. The IBM 403 added the ability to print up to three lines --e.g. a multiline shipping address--from one card instead of just one line with the 402. Like other IBM unit record equipment, the 402 and 403 were controlled by a removable plugboard.