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Zenith Z-180
Zenith Data Systems Corporation (ZDS) was an American computer systems manufacturing company active from 1979 to 1996. It was originally a division of the Zenith Radio Company (later Zenith Electronics), after they had purchased the Heath Company and, by extension, their Heathkit line of electronic kits and kit microcomputers, from Schlumberger in October 1979. ZDS originally operated from Heath's own headquarters in St. Joseph, Michigan. By the time Zenith acquired Heathkit, their H8 kit computer already had an installed fanbase of scientific engineers and computing enthusiasts. ZDS's first offerings were merely preassembled versions of existing Heathkit computers, but within a few years, the company began selling systems of their own design, including the Z-100, which was a hybrid 8085- and 8088-based computer capable of running both CP/M and MS-DOS. ZDS largely avoided the retail consumer market, instead focusing on selling directly to businesses, educational institutions ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Buffalo Grove, Illinois
Buffalo Grove is a Village (United States)#Illinois, village in Lake County, Illinois, Lake and Cook County, Illinois, Cook Counties in the U.S. state of Illinois. A suburb of Chicago, it lies about northwest of Downtown Chicago and north of O'Hare International Airport. As of the 2020 United States census, 2020 Census, Buffalo Grove has a population of 43,212. It totals of land, with the top three-quarters in Lake County and the bottom quarter in Cook County. Roads in the village such as Lake Cook Road and Illinois Route 83 converge on I-294. It is part of the Chicago Metropolitan Area. Before Manifest destiny, European colonization, Native Americans in the United States, Native American Potawatomi tribes inhabited the present area. The name "Buffalo Grove" comes from the English translation of the Potawatomi name for Buffalo Creek (Illinois), Buffalo Creek, which flows through some of the village. Initial Homesteading, Homesteaders sold their land to agricultural Catholic ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Internal Revenue Service
The Internal Revenue Service (IRS) is the revenue service for the Federal government of the United States, United States federal government, which is responsible for collecting Taxation in the United States, U.S. federal taxes and administering the Internal Revenue Code, the main body of the federal statutory tax law. It is an agency of the United States Department of the Treasury, Department of the Treasury and led by the Commissioner of Internal Revenue, who is appointed to a five-year term by the President of the United States. The duties of the IRS include providing tax assistance to taxpayers; pursuing and resolving instances of erroneous or fraudulent tax filings; and overseeing various benefits programs, including the Affordable Care Act. The IRS originates from the Commissioner of Internal Revenue, a federal office created in 1862 to assess the nation's first income tax to fund the American Civil War. The temporary measure funded over a fifth of the Union's war expens ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hard Sectoring
Hard sectoring in a magnetic or optical data storage device is a form of sectoring which uses a physical mark or hole in the recording medium to reference sector locations. In older 8- and 5-inch floppy disks, hard sectoring was implemented by punching sector holes in the disk to mark the start of each sector. These were equally spaced holes, at a common radius. This was in addition to the index hole, situated between two sector holes, to mark the start of the entire track of sectors. When the index or sector hole was recognized by an optical sensor, a sector signal was generated. Timing electronics or software would use the faster timing of the index hole between sector holes, to generate an index signal. Data read and write is faster in this technique than soft sectoring as no operations are to be performed regarding the starting and ending points of tracks. Storage formats using hard sectoring *32 sector 8-inch floppy disks *10 sector and 16 sector 5-inch floppy disks *Numer ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
HDOS
HDOS is an early microcomputer operating system, originally written for the Heathkit H8 computer system and later also available for the Heathkit H89 and Zenith Z-89 computers. The author was Heath Company employee Gordon Letwin, who later was an early employee of Microsoft and lead architect of OS/2. HDOS originally came with a limited set of system software tools, including an assembler, but many commercial and large set of freeware programs from HUG (Heath User Group) became available for it eventually. HDOS 2.0 is notable because it was one of the first microcomputer operating systems to use loadable device drivers to achieve a degree of device independence and extensibility. Device names followed the RSX-11-style convention of DKn: where the first two letters were the device driver file name and n was a number (DK0:, DK1:, and so on would all be handled by DK.SYS). Other similarities to RSX included the use of PIP for file transfer, and the use of EOT for file termi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Punched Tape
file:PaperTapes-5and8Hole.jpg, Five- and eight-hole wide punched paper tape file:Harwell-dekatron-witch-10.jpg, Paper tape reader on the Harwell computer with a small piece of five-hole tape connected in a circle – creating a physical program loop Punched tape or perforated paper tape is a form of data storage that consists of a long strip of paper through which small holes are punched. It was developed from and was subsequently used alongside punched cards, the difference being that the tape is continuous. Punched cards, and chains of punched cards, were used for control of looms in the 18th century. Use for telegraphy systems started in 1842. Punched tapes were used throughout the 19th and for much of the 20th centuries for programmable looms, teleprinter communication, for input to computers of the 1950s and 1960s, and later as a storage medium for minicomputers and Numerical control, CNC machine tools. During the Second World War, high-speed punched tape systems using opti ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
8080
The Intel 8080 is Intel's second 8-bit microprocessor. Introduced in April 1974, the 8080 was an enhanced successor to the earlier Intel 8008 microprocessor, although without binary compatibility.'' Electronic News'' was a weekly trade newspaper. The same advertisement appeared in the May 2, 1974, issue of ''Electronics'' magazine. Originally intended for use in embedded systems such as calculators, cash registers, computer terminals, and industrial robots, its robust performance soon led to adoption in a broader range of systems, ultimately helping to launch the microcomputer industry. Several key design choices contributed to the 8080’s success. Its 40‑pin package simplified interfacing compared to the 8008’s 18‑pin design, enabling a more efficient data bus. The transition to NMOS technology provided faster transistor speeds than the 8008's PMOS while also simplifying interfacing by making it TTL compatible. An expanded instruction set and a full 16-bit address ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Intel
Intel Corporation is an American multinational corporation and technology company headquartered in Santa Clara, California, and Delaware General Corporation Law, incorporated in Delaware. Intel designs, manufactures, and sells computer components such as central processing units (CPUs) and related products for business and consumer markets. It is one of the world's List of largest semiconductor chip manufacturers, largest semiconductor chip manufacturers by revenue, and ranked in the Fortune 500, ''Fortune'' 500 list of the List of largest companies in the United States by revenue, largest United States corporations by revenue for nearly a decade, from 2007 to 2016 Fiscal year, fiscal years, until it was removed from the ranking in 2018. In 2020, it was reinstated and ranked 45th, being the List of Fortune 500 computer software and information companies, 7th-largest technology company in the ranking. It was one of the first companies listed on Nasdaq. Intel supplies List of I ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Electronic Kit
An electronic kit is a package of electrical components used to build an electronic device. Generally, kits are composed of electronic components, a circuit diagram (schematic), assembly instructions, and often a printed circuit board (PCB) or another type of prototyping board. There are two types of kits. Some build a single device or system. Other types used for education demonstrate a range of circuits. These will include a solderless construction board of some type, such as: * Components mounted in plastic blocks with side contacts, that are held together in a base, e.g. Denshi blocks * Springs on a card board, the springs trap wire leads, or component leads, such as Philips EE electronic experiment kits. These are a cheap and flexible option * Professional type prototyping boards, ( breadboards) into which component leads are inserted, following documentation of the "kit". The first type of kit for constructing a single device normally uses a PCB on which components a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Zenith Z-19 Terminal
The zenith (, ) is the imaginary point on the celestial sphere directly "above" a particular location. "Above" means in the vertical direction (plumb line) opposite to the gravity direction at that location (nadir). The zenith is the "highest" point on the celestial sphere. The direction opposite of the zenith is the nadir. Origin The word ''zenith'' derives from an inaccurate reading of the Arabic expression (), meaning "direction of the head" or "path above the head", by Medieval Latin scribes in the Middle Ages (during the 14th century), possibly through Old Spanish. It was reduced to ''samt'' ("direction") and miswritten as ''senit''/''cenit'', the ''m'' being misread as ''ni''. Through the Old French ''cenith'', ''zenith'' first appeared in the 17th century. Relevance and use The term ''zenith'' sometimes means the culmination">highest point, way, or level reached by a celestial body on its daily apparent path around a given point of observation. This sense of the word ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Packard Bell
Packard Bell is a personal computer hardware brand which originated as Packard Bell Electronics, Inc., an independent American computer company. Packard Bell Electronics was founded in Los Angeles in 1986 by Israeli-American investors who bought the trademark rights to the historic Packard Bell Corporation from Teledyne; in spite of similarities in their names, Packard Bell has no connection to either Hewlett-Packard or Bell System. Packard Bell helped to pioneer the mass market for PCs in the United States by selling in big office stores. In the early 1990s, the company entered the European market and opened its regional headquarters in Wijchen, Netherlands, in 1993. By this time, they had become the second largest original equipment manufacturer (OEM) for IBM PC–compatibles in the U.S. Packard Bell merged its operations with Japanese electronics conglomerate NEC, known as Packard Bell NEC, in 1996; NEC took majority control in 1998 and made it a subsidiary. At the tim ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nokia
Nokia Corporation is a Finnish multinational corporation, multinational telecommunications industry, telecommunications, technology company, information technology, and consumer electronics corporation, originally established as a pulp mill in 1865. Nokia's main headquarters are in Espoo, Finland, in the Helsinki metropolitan area, but the company's actual roots are in the Tampere region of Pirkanmaa.HS: Nokian juuret ovat Tammerkosken rannalla (in Finnish) In 2020, Nokia employed approximately 92,000 people across over 100 countries, did business in more than 130 countries, and reported annual revenues of around €23 billion. Nokia is a public limited company listed on the Nasdaq Helsinki and New York Stock Exchange. It was the world's 415th-largest company ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
The Pentagon
The Pentagon is the headquarters building of the United States Department of Defense, in Arlington County, Virginia, across the Potomac River from Washington, D.C. The building was constructed on an accelerated schedule during World War II. As a symbol of the United States Armed Forces, U.S. military, the phrase ''The Pentagon'' is often used as a metonym for the Department of Defense and its leadership. The building was designed by American architect George Bergstrom and built by contractor John McShain. Ground was broken on 11 September 1941, and the building was dedicated on 15 January 1943. General Brehon Somervell provided the major impetus to gain Congressional approval for the project. Colonel Leslie Groves was responsible for overseeing the project for the United States Army Corps of Engineers, U.S. Army Corps of Engineers, which supervised it. The Pentagon is List of largest office buildings, the world's second-largest office building, with about of floor space, of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
