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A 1944 electro-mechanical programmable calculating machine, the Automatic Sequence Controlled Calculator or Harvard Mark I, used paper tape with 24 rows, [4] The IBM Selective Sequence Electronic Calculator (SSEC) used paper tape with 74 rows. [5] Australia's 1951 electronic computer, CSIRAC, used 3-inch (76 mm) wide paper tape with twelve rows ...
Usually, an interface module, such as the Casio FA-1, was used to connect the calculator to an ordinary cassette recorder, and digital data were encoded as frequency-shift keyed audio signals. [10] Sharp and Hewlett-Packard also sold dedicated micro-or mini-cassette recorders that connected directly to the calculator. These set-ups, while being ...
Friden Calculator Friden Flexowriter. In 1957, Friden purchased the Commercial Controls Corporation of Rochester, New York.This gave them the Flexowriter teleprinter, an electric typewriter capable of being used as part of unit record equipment developed in World War II for the Department of the Navy to automatically type "regret to inform you" letters to the survivors of fallen servicemen ...
The first American-made pocket-sized calculator, the Bowmar 901B (popularly termed The Bowmar Brain), measuring 5.2 by 3.0 by 1.5 inches (132 mm × 76 mm × 38 mm), came out in the Autumn of 1971, with four functions and an eight-digit red LED display, for US$240, while in August 1972 the four-function Sinclair Executive became the first ...
6.875 x 3.31 x 0.938: No 1992 130 Allowed Allowed TI-86: Zilog Z80 @ 6 MHz 128 KiB of RAM 128×64 pixels 21×8 characters 7.3 × 3.5 × 1.0 [4] No 1996 150 Allowed Allowed TI-89: Motorola 68000 @ 10 MHz/12 MHz (nominal) 256 KiB of RAM (188 KB user accessible), 2 MiB of Flash ROM 160×100 pixels 7.3 × 3.5 × 1.0 [4] Yes 1998 159.99 Allowed Not ...
Note the 6-armed "starfish" hubs holding circular white tape reels in place. The vertical aluminium block above each pair of tape reels holds the read/write heads. DECtape , originally called Microtape , is a magnetic tape data storage medium used with many Digital Equipment Corporation computers , including the PDP-6 , PDP-8 , LINC-8 , PDP-9 ...
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