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plug board panels), was far more complex than initially anticipated. It took 425 hours to fully program the first machine installed at a commercial client in New York. Given that ET sales representatives at that time were responsible for installing the machines they sold (which typically only involved unboxing typewriters), this meant that the product cost far more to install than was planned, as additional system engineers had to be hired and trained to support the install effort.
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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. However the IBM ET sales representatives soon found that programming the IBM 6400 (which involved wiring
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Typewriter (ET) division in 1962. 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.
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The magnetic card reader uses large cards (30 cm x 35 cm) where the front of the card is used as a printer ledger while the same information is stored on a 2.5 cm (0.98 in) 4-track
324:) was moved to the IBM Data Processing Division (DPD) in 1964. However given their focus on launching the System/360 at that time, the product was not heavily promoted after this.
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This article is about a 1960s accounting machine built by IBM. In 1995 IBM released a printer also called the IBM 6400. For the IBM 6400 Printer, see
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In 1968 an IBM 6430 was developed in Don Mills. The programming was done on cards and the programs steps were controlled by electronics (SMS).
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IBM withdrew all 6400 System
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Optional input/output devices include a card reader and punch, a paper tape reader and punch, and a magnetic card reader.
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With an optional 6426 it weighs 1,250 lb (570 kg) and occupies an area of 98 sq ft (9.1 m).
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With an optional 6426 it weighs 1,000 lb (450 kg) and occupies an area of 89 sq ft (8.3 m).
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The magnetic tape can be read or written in 0.5 seconds and can store 252 alphanumeric characters.
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A 6420 weighs 1,000 lb (450 kg) and occupies an area of 86 sq ft (8.0 m)
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This was also referred to as the 6420 Magnetic Ledger
Accounting Machine and was sold with a 6425
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A 6410 weighs 750 lb (340 kg) and occupies an area of 77 sq ft (7.2 m).
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is a series of four calculating and accounting machines produced by the
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The output for each machine is facilitated using a keyboardless
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The monthly rental was US$ 495, purchase price was US$ 23,600.
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The monthly rental was $ 520, purchase price was $ 24,300
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The monthly rental was $ 115, purchase price was $ 5,175
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The monthly rental was $ 175, purchase price was $ 8,300
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The monthly rental was $ 90, purchase price was $ 4,075
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The 6400 System consists of the following hardware:
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297:The 6405, 6410, and 6420 were developed by IBM in
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365:. D & K Book Company, Inc. pp. 39–43.
363:The Romance Division... A Different Side of IBM
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391:. Dalton Communications. 1965. p. 22.
361:DeLoca, Cornelius; Kalow, Samuel (1991).
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