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By 1970, a calculator could be made using just a few chips of low power consumption, allowing portable models powered from rechargeable batteries. The first handheld calculator was a 1967 prototype called Cal Tech, whose development was led by Jack Kilby at Texas Instruments in a research project to produce a portable calculator. It could add ...
A partially disassembled Curta calculator, showing the digit slides and the stepped drum behind them Curta Type I calculator, top view Curta Type I calculator, bottom view. The Curta is a hand-held mechanical calculator designed by Curt Herzstark. [1] It is known for its extremely compact design: a small cylinder that fits in the palm of the hand.
Cardea or Carda was the ancient Roman goddess of the hinge (Latin cardo, cardinis), Roman doors being hung on pivot hinges.The Augustan poet Ovid conflates her with another archaic goddess named Carna, whose festival was celebrated on the first day of June and for whom he gives the alternative name Cranê or Cranea, a nymph.
Open doors on a Chrysler Airflow. Car doors are designed to facilitate ingress and egress by car passengers. [1]Unlike other types of doors, the exterior side of the vehicle door contrasts in its design and finish from its interior side (the interior part is typically equipped with a door card (in British English) or a door panel (in American English) that has decorative and functional features.
In the 1920s, the novelist and engineer Nevil Shute Norway (he called his autobiography Slide Rule) was Chief Calculator on the design of the British R100 airship for Vickers Ltd. from 1924. The stress calculations for each transverse frame required computations by a pair of calculators (people) using Fuller's cylindrical slide rules for two or ...
This is a list of cars with non-standard door designs, sorted by door type.These car models use passenger door designs other than the standard design, which is hinged at the front edge of the door, and swings away from the car horizontally and towards the front of the car.
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