IBM 6400 Accounting Machine

[1] It was announced in January 1963 and was sold to perform what IBM referred to as BICARSA, which stood for billing, inventory control, accounts receivable and sales analysis.

[2] The output for each machine is facilitated using a keyboardless IBM Selectric typewriter mounted above the CPU.

The 6400 System consists of the following hardware:[5] The 6405, 6410, and 6420 were developed by IBM in Lexington, Kentucky, United States.

IBM initially launched a major sales campaign including print, TV and radio advertising.

They received what they considered to be an acceptable number of orders and deliveries began in mid 1963.