ANITA Desk Calculators using both Transistor Logic & Integrated Circuits
ANITA 1011
ANITA 1011
Power supply - AC mains.
Display is 10 digits, Nixie tubes.
4-function, %, memory, uses RPN (Reverse Polish Notation).
Mainly uses transistors, but has 5 integrated circuits made by Marconi-Elliott Microelectronics using "MOST" (Metal-Oxide Semiconductor Transistor) technology. It was claimed that each integrated circuit contains about 200 transistors.
265 x 335 x 172 mm (10.4" x 13.25" x 6.75").
Introduced 1969, circuit boards on this example date stamped mid-1970.
Made in England by Sumlock Anita Electronics Ltd, distributed by Sumlock Comptometer Ltd.
Marconi-Elliot Microelectronics was closed down in July 1971 by GEC (the British General Electric Company) during one of the periodic industry downturns.
The whole of the British commodity semiconductor industry was to meet a similar fate.
The "Nixie"-type tube display has a separate tube for each digit. Note that the decimal point is displayed by small neon lamps.
The machine uses Reverse Polish Notation (RPN). The first number is keyed in and and the key
marked "ENTER 1ST NUMBER" is pressed. The second number is then keyed in and the key for the required operator is pressed, after which the calculation is performed and the answer is displayed.
