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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$240, while in August 1972 the four-function Sinclair Executive became the first ...
Although it was still too bulky to easily fit in a pocket, [1] it was an important step toward the development of the pocket calculator. [2] Ad showing the calculator's original price. The EL-8's original price in Japan was 84,800 Japanese yen. [3] The retail price in 1971 was US$ 345 (equivalent to US$ 2,308 in 2021). [1] [7]
Entry of mixed fractions involves using decimal points to separate the parts. For example, the sequence 3. 1 5. 1 6 →cm converts 3 + 15 ⁄ 16 inches to 10.0 cm (approximately). The calculator may be set to automatically display values as mixed fractions by toggling the FDISP key. The maximum denominator may be specified using the /c function.
1100-3A - The 1100-3A is a black and grey/gray 3.2 oz. desktop calculator made with 50% recycled plastic and has a 10 digit angled LCD display. It has 3-key independent memory and tax keys. [11] 1180-3A - The 1180-3A is a 4.8 oz black desktop calculator with a 12 digit angled LCD display. It is made with 40% recycled plastic and it has cost ...
The Cambridge had been preceded by the Sinclair Executive, Sinclair's first pocket calculator, in September 1972.At the time, the Executive was smaller and noticeably thinner than any of its competitors, at 56 by 138 by 9 millimetres (2.20 in × 5.43 in × 0.35 in), fitting easily into a shirt pocket.
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 ...
The Sinclair Executive was the world's first "slimline" pocket calculator, and the first to be produced by Clive Sinclair's company Sinclair Radionics.Introduced in 1972, the calculator was produced in at least two versions with different keyboard markings; a variant called the Sinclair Executive Memory was introduced in 1973.
With an eight-digit display, the calculator could display positive numbers between 0.0000001 and 99,999,999, and negative numbers between -0.000001 and -9,999,999. [12] Calculators of the time tended to have displays of between 3 and 12 digits, as reducing the number of digits was an effective way of reducing the cost of the calculator.