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The calculator uses the proprietary HP Nut processor produced in a bulk CMOS process and featured continuous memory, whereby the contents of memory are preserved while the calculator is turned off. [13] Though commonplace now, this was still notable in the early 1980s, and is the origin of the "C" in the model name.
HP's first scientific calculator, HP-35 With this in mind, HP built the HP 9100 desktop scientific calculator. This was a full-featured calculator that included not only standard "adding machine" functions but also powerful capabilities to handle floating-point numbers, trigonometric functions , logarithms, exponentiation, and square roots .
Demolition waste. Demolition waste is waste debris from destruction of buildings, roads, bridges, or other structures. [1] Debris varies in composition, but the major components, by weight, in the US include concrete, wood products, asphalt shingles, brick and clay tile, steel, and drywall. [2]
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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 ...
Direct reduction processes can be divided roughly into two categories: gas-based and coal-based. In both cases, the objective of the process is to remove the oxygen contained in various forms of iron ore (sized ore, concentrates, pellets, mill scale, furnace dust, etc.) in order to convert the ore to metallic iron, without melting it (below 1,200 °C (2,190 °F)).
Improvised armour added to a truck by railway shop workers for the Danish resistance movement near the end of World War II. Improvised vehicle armour is a form of vehicle armour consisting of protective materials added to a vehicle such as a car, truck, or tank in an irregular and extemporized fashion using available materials.
Christopher Michael Langan (born March 25, 1952) is an American horse rancher and former bar bouncer, known for scoring highly on an IQ test that gained him entry to a high IQ society, and for being formerly listed in the Guinness Book of Records high IQ section under the pseudonym of Eric Hart, alongside Marilyn vos Savant and Keith Raniere.