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Sharp QT-8D
The Sharp Corporation, Sharp QT-8D Micro Compet, a small electronic desktop calculator, was the first mass-produced calculator to have its logic circuitry entirely implemented with LSI (''large-scale integration'') integrated circuits (ICs) based on MOS (''MOSFET, metal-oxide-semiconductor'') technology. When it was introduced in late 1969, it was one of the smallest electronic calculators ever produced commercially. Previous electronic calculators had been about the size of a typewriter and had logic circuits built from numerous discrete transistors and diodes or small- to medium-scale ICs. The QT-8D's logic circuits were packed into just four LSI ICs. The QT-8D was released in Japan at a price of 99,800 Japanese yen, a new low for electronic calculators. The retail price in the United States was $395 in 1970, equivalent to about $2,790 in 2021. The QT-8D only performs the four basic arithmetic operations of addition, subtraction, multiplication, and division. Like many calculato ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sharp QT-8D Micro Compet Front View
Sharp or SHARP may refer to: Acronyms * SHARP (helmet ratings) (Safety Helmet Assessment and Rating Programme), a British motorcycle helmet safety rating scheme * Self Help Addiction Recovery Program, a charitable organisation founded in 1991 by Barbara Bach and Pattie Boyd * Sexual Harassment/Assault Response & Prevention, a US Army program dealing with sexual harassment * Skinheads Against Racial Prejudice, an anti-racist Trojan skinhead organization formed to combat White power skinheads * Society for the History of Authorship, Reading and Publishing * Stationary High Altitude Relay Platform, a 1980s beamed-power aircraft * Super High Altitude Research Project, a 1990s project to develop a high-velocity gun Companies * I. P. Sharp Associates, a former Canadian computer services company * Sharp Airlines, an Australian regional airline * Sharp Corporation, a Japanese electronics manufacturer * Sharp Entertainment, an American TV program producer * Sharp HealthCare, a hospita ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sharp QT-8D Micro Compet Main PCB
Sharp or SHARP may refer to: Acronyms * SHARP (helmet ratings) (Safety Helmet Assessment and Rating Programme), a British motorcycle helmet safety rating scheme * Self Help Addiction Recovery Program, a charitable organisation founded in 1991 by Barbara Bach and Pattie Boyd * Sexual Harassment/Assault Response & Prevention, a US Army program dealing with sexual harassment * Skinheads Against Racial Prejudice, an anti-racist Trojan skinhead organization formed to combat White power skinheads * Society for the History of Authorship, Reading and Publishing * Stationary High Altitude Relay Platform, a 1980s beamed-power aircraft * Super High Altitude Research Project, a 1990s project to develop a high-velocity gun Companies * I. P. Sharp Associates, a former Canadian computer services company * Sharp Airlines, an Australian regional airline * Sharp Corporation, a Japanese electronics manufacturer * Sharp Entertainment, an American TV program producer * Sharp HealthCare, a hospi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Computer History Museum
The Computer History Museum (CHM) is a museum of computer history, located in Mountain View, California. The museum presents stories and artifacts of Silicon Valley and the information age, and explores the computing revolution and its impact on society. History The museum's origins date to 1968 when Gordon Bell began a quest for a historical collection and, at that same time, others were looking to preserve the Whirlwind computer. The resulting ''Museum Project'' had its first exhibit in 1975, located in a converted coat closet in a DEC lobby. In 1978, the museum, now ''The Digital Computer Museum'' (TDCM), moved to a larger DEC lobby in Marlborough, Massachusetts. Maurice Wilkes presented the first lecture at TDCM in 1979 – the presentation of such lectures has continued to the present time. TDCM incorporated as '' The Computer Museum'' (TCM) in 1982. In 1984, TCM moved to Boston, locating on Museum Wharf. In 1996/1997, the TCM History Center (TCMHC) was established; a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Elektronika
Elektronika, also spelt Electronika and Electronica (russian: Электроника, "Electronics"), is the brand name used for many different electronics, electronic products built by factories belonging to the Soviet Ministry of Electronic Industry, including calculators, electronic watches, portable games, and radios. Many Elektronika designs were the result of efforts by Soviet engineers, who were working for the Soviet military–industrial complex but were challenged with producing consumer goods which were in great shortage in the Soviet Union. The brand is still in use in Belarus. Calculators Most notable is a line of calculators, which started production in 1968. The Elektronika calculators were produced in a variety of sizes and function sets, ranging from large, bulky four-function calculators to smaller models designed for use in schools operating on a special, safer 42V standard (like the MK-SCH-2). As time progressed, Elektronika calculators were produced that ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Facit 1115J And Addo-X 9354
Facit (''Facit AB'') was an industrial corporation and manufacturer of office products including furniture. It was based in Åtvidaberg, Sweden, and founded in 1922 as ''AB Åtvidabergs Industrier''. Facit AB, a manufacturer of mechanical calculators, was incorporated into the corporation the same year. In 1932, the first ten-digit calculator was manufactured by Åtvidaberg Industries, it was named FACIT and became a great success. In the 1950s, Facit introduced a mascot character, a short, smiling man with a wizard's cap called "Facit Man". The character first appeared in the instruction manuals for Facit's calculators. The character lasted into the 1970s. By the early 1960s the corporation had a total of 8,000 employees with subsidiaries in over 100 countries, and the subsidiary Facit had come to dominate the business of the corporation. In 1965 the entire corporation changed its name to ''Facit AB''. The following year, it acquired its competitor '' Addo'', which was maintai ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Facit
Facit (''Facit AB'') was an industrial corporation and manufacturer of office products including furniture. It was based in Åtvidaberg, Sweden, and founded in 1922 as ''AB Åtvidabergs Industrier''. Facit AB, a manufacturer of mechanical calculators, was incorporated into the corporation the same year. In 1932, the first ten-digit calculator was manufactured by Åtvidaberg Industries, it was named FACIT and became a great success. In the 1950s, Facit introduced a mascot character, a short, smiling man with a wizard's cap called "Facit Man". The character first appeared in the instruction manuals for Facit's calculators. The character lasted into the 1970s. By the early 1960s the corporation had a total of 8,000 employees with subsidiaries in over 100 countries, and the subsidiary Facit had come to dominate the business of the corporation. In 1965 the entire corporation changed its name to ''Facit AB''. The following year, it acquired its competitor ''AB Addo, Addo'', which was ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sharp EL-8
The Sharp EL-8, also known as the ELSI-8, was one of the earliest mass-produced hand-held electronic calculators and the first hand-held calculator to be made by Sharp. Introduced around the start of 1971, it was based on Sharp's preceding QT-8D and QT-8B compact desktop calculators and used the same logic circuits, but it was redesigned to fit in a much smaller case. Most electronic calculators before the EL-8 were intended for desktop use. Sharp's predecessor to the EL-8, the battery-powered QT-8B, was just a portable version of a compact desk calculator. The EL-8 was much smaller, small enough to be used in one's hand: long, wide, and thick, and weighing with batteries. Although it was still too bulky to easily fit in a pocket, it was an important step toward the development of the pocket calculator. The EL-8's original price in Japan was 84,800 Japanese yen. The retail price in 1971 was . The operation and performance of the EL-8 are identical to its predecessor calcu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Battery Pack
A battery pack is a set of any number of (preferably) identical batteries or individual battery cells. They may be configured in a series, parallel or a mixture of both to deliver the desired voltage, capacity, or power density. The term battery pack is often used in reference to cordless tools, radio-controlled hobby toys, and battery electric vehicles. Components of battery packs include the individual batteries or cells, and the interconnects which provide electrical conductivity between them. Rechargeable battery packs often contain a temperature sensor, which the battery charger uses to detect the end of charging. Interconnects are also found in batteries as they are the part which connects each cell, though batteries are most often only arranged in series strings. When a pack contains groups of cells in parallel there are differing wiring configurations which take into consideration the electrical ''balance'' of the circuit. Battery regulators are sometimes used to kee ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rechargeable Battery
A rechargeable battery, storage battery, or secondary cell (formally a type of Accumulator (energy), energy accumulator), is a type of electrical battery which can be charged, discharged into a load, and recharged many times, as opposed to a disposable or primary battery, which is supplied fully charged and discarded after use. It is composed of one or more electrochemical cells. The term "accumulator" is used as it accumulator (energy), accumulates and energy storage, stores energy through a reversible electrochemical Chemical reaction, reaction. Rechargeable batteries are produced in many different shapes and sizes, ranging from Button cell#Rechargeable variants, button cells to megawatt systems connected to grid energy storage, stabilize an electrical distribution network. Several different combinations of electrode materials and electrolytes are used, including lead–acid battery, lead–acid, zinc–air battery, zinc–air, nickel–cadmium battery, nickel–cadmium (Ni ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Power Supply
A power supply is an electrical device that supplies electric power to an electrical load. The main purpose of a power supply is to convert electric current from a source to the correct voltage, current, and frequency to power the load. As a result, power supplies are sometimes referred to as electric power converters. Some power supplies are separate standalone pieces of equipment, while others are built into the load appliances that they power. Examples of the latter include power supplies found in desktop computers and consumer electronics devices. Other functions that power supplies may perform include limiting the current drawn by the load to safe levels, shutting off the current in the event of an electrical fault, power conditioning to prevent electronic noise or voltage surges on the input from reaching the load, power-factor correction, and storing energy so it can continue to power the load in the event of a temporary interruption in the source power (uninterruptible ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sharp QT-8B
The Sharp Corporation, Sharp QT-8B Micro Compet, a portable electronic desktop calculator, was the first mass-produced calculator to be battery-powered. Introduced in mid-1970, it was based on its immediate predecessor, the Sharp QT-8D, QT-8D introduced in late 1969, but it replaced the QT-8D's integrated power supply with a Rechargeable battery, rechargeable battery pack. It has the same calculating integrated circuits as the QT-8D and is of similar appearance and dimensions; the power supply is the only major difference. The QT-8B's release price in Japan was 117,000 Japanese yen, yen. The U.S. price in mid-1971 was $495, equivalent to about $2,700 in 2010. These prices were somewhat higher than those for the preceding QT-8D. The QT-8B's battery pack contains six Nickel-cadmium battery, nickel-cadmium C battery, C batteries connected in Series and parallel circuits, series, giving a total voltage of 7.5 volts and, with the original batteries, a total capacity of 1200 milliampere-h ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
