The Commodore 9R-25 calculator, introduced circa 1976, is a great example of the technological advancements in personal computing devices of its era. Manufactured by Commodore, a company renowned for its contributions to the computing industry, this calculator offers a blend of functionality and aesthetic design that captures the essence of …
The Colex 812-R calculator, introduced in 1975, is a robust and feature-rich device that stands out for its unique design and functional capabilities. Manufactured by Colex in Hong Kong, this calculator is encased in a glossy white plastic shell with a black smooth plastic front, reminiscent of the Commodore PET …
The Clever 2101 calculator, introduced around 1978, is a compact and unusual model that bears similarities to other calculators of its time, such as the Decimo Vatman Mini MII. This calculator is a product of Clever Electronic Calculator, although the specific manufacturing details remain obscure, with some speculating that it …
The Citizen 831RD calculator, introduced in the late 1970s, is a robust and versatile calculator designed for both desktop and handheld use. Manufactured by Citizen Business Machines Inc. in Japan, this calculator is notable for its distinctive design and reliable functionality. The calculator’s dimensions are approximately 86mm in width, 165mm …
The Citizen 830R calculator, introduced in 1976 by Citizen Business Machines Inc., is a robust and versatile device that combines functionality with a sleek design. This calculator is notable for its sturdy construction and reliable performance, making it suitable for both desktop and handheld use. Physical Characteristics The Citizen 830R …
The Citizen 810R, released in 1974 is a sturdy device, equally at home on a desk or in hand and embodies the transitional period between bulky desktop machines and truly portable calculators. Measuring 87mm x 150mm x 33mm and weighing a substantial 276g including its rechargeable batteries, the 810R was …
The Citizen 801D calculator, released around 1976, is a sleek device, with its light grey front and dark grey back. It measures approximately 82mm x 136mm x 25mm and weighs a mere 132g without batteries. The calculator’s design showcases a rounded two-piece plastic case, featuring a flush, wrap-around green plastic …
The Citizen 800R calculator, released in 1973, represents a pivotal moment in the evolution of handheld computing devices. This sturdy machine, equally at home on a desk or in hand, exemplifies the transitional period between the first generation of electronic calculators and the more sophisticated models that would follow. Measuring …
The Citizen 800D calculator, manufactured by Citizen Business Machines Inc. in Japan, represents a notable entry in the realm of handheld electronic calculators from the mid-1970s. Released in 1976, this device exemplifies the rapid technological advancements of its era, offering users a compact yet powerful computational tool. Measuring approximately 82mm …
The Citizen Eight calculator, introduced in 1976, is a fascinating piece of technological history from the era when electronic calculators were becoming increasingly compact and affordable. This palm-sized device, measuring 64mm x 100mm x 22mm and weighing just 84 grams without batteries, epitomizes the drive towards miniaturization in consumer electronics …
