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IBM 3800
The IBM 3800 is a discontinued continuous forms laser printer designed and manufactured by IBM. It is significant as a product because it was both the first laser printer manufactured by IBM, and the first commercially available continuous forms laser printer. The 3800 was initially positioned as a line printer replacement with additional features. Besides the much greater speed, enhancements over the line printer included: * Forms overlay – the ability to print a predefined form along with the data, eliminating the need for preprinted forms. * Thirteen different character sets. The standard 3800 could use only one per print data set; a special feature allowed four to be used at a time. * Multiple copies printed on single-ply paper, rather than using multiple-ply paper, data could be changed or suppressed between copies. * User-defined graphic characters could be used along with standard character sets. Later the 3800 family supported Advanced Function Presentation (AFP), a page ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Laser Printing
Laser printing is an electrostatic digital printing process. It produces high-quality text and graphics (and moderate-quality photographs) by repeatedly passing a laser beam back and forth over a negatively-charged cylinder called a "drum" to define a differentially-charged image. The drum then selectively collects electrically-charged powdered ink (toner), and transfers the image to paper, which is then heated to permanently fuse the text, imagery, or both, to the paper. As with digital photocopiers, laser printers employ a xerographic printing process. Laser printing differs from traditional xerography as implemented in analog photocopiers in that in the latter, the image is formed by reflecting light off an existing document onto the exposed drum. Invented at Xerox PARC in the 1970s, laser printers were introduced for the office and then home markets in subsequent years by IBM, Canon, Xerox, Apple, Hewlett-Packard and many others. Over the decades, quality and speed have in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tucson, Arizona
, "(at the) base of the black ill , nicknames = "The Old Pueblo", "Optics Valley", "America's biggest small town" , image_map = , mapsize = 260px , map_caption = Interactive map outlining Tucson , image_map1 = File:Pima County Incorporated and Unincorporated areas Tucson highlighted.svg , mapsize1 = 250px , map_caption1 = Location within Pima County , pushpin_label = Tucson , pushpin_map = USA Arizona#USA , pushpin_map_caption = Location within Arizona##Location within the United States , subdivision_type = Country , subdivision_type1 = State , subdivision_type2 = County , subdivision_name = United States , subdivision_name1 = Arizona , subdivision_name2 = Pima , established_title = Founded , established_date = August 20, 1775 , established_title1 = Incorporated , e ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Computerworld
''Computerworld'' (abbreviated as CW) is an ongoing decades old professional publication which in 2014 "went digital." Its audience is information technology (IT) and business technology professionals, and is available via a publication website and as a digital magazine. As a printed weekly during the 1970s and into the 1980s, ''Computerworld'' was the leading trade publication in the data processing industry. Indeed, based on circulation and revenue it was one of the most successful trade publications in any industry. Later in the 1980s it began to lose its dominant position. It is published in many countries around the world under the same or similar names. Each country's version of ''Computerworld'' includes original content and is managed independently. The parent company of Computerworld US is IDG Communications. History The first issue was published in 1967. Going international The company IDG offers the brand "Computerworld" in 47 countries worldwide, the name and fre ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Page Printer
A page printer is a computer printer which processes and prints a whole page at a time, as opposed to printers which print one line or character at a time such as line printers and dot-matrix printers. Page printers are often all incorrectly termed “laser printers”—although virtually all laser printers are page printers, other page printing technologies also exist Components The components of a page printer are: *A print engine, "the unit within a printer that does the actual printing." For example, in a laser printer this would consist of the laser and drum and the mechanical paper feeds. * Memory to process input and build up the image of a page. The printer may have its own memory or may use the host computer's memory. * A page description language (PDL), with commands which tell the printer how to format the page. Popular PDLs are PCL (Printer Command Language) from Hewlett-Packard, PostScript from Adobe Systems and PostScript clones, and Windows’ Graphics Device ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Selenium
Selenium is a chemical element with the symbol Se and atomic number 34. It is a nonmetal (more rarely considered a metalloid) with properties that are intermediate between the elements above and below in the periodic table, sulfur and tellurium, and also has similarities to arsenic. It seldom occurs in its elemental state or as pure ore compounds in the Earth's crust. Selenium – from Greek ( 'Moon') – was discovered in 1817 by , who noted the similarity of the new element to the previously discovered tellurium (named for the Earth). Selenium is found in metal sulfide ores, where it partially replaces the sulfur. Commercially, selenium is produced as a byproduct in the refining of these ores, most often during production. Minerals that are pure selenide or selenate compounds are known but rare. The chief commercial uses for selenium today are glassmaking and pigments. Selenium is a semiconductor and is used in photocells. Applications in electronics, once important, have been ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Xerox
Xerox Holdings Corporation (; also known simply as Xerox) is an American corporation that sells print and electronic document, digital document products and services in more than 160 countries. Xerox is headquartered in Norwalk, Connecticut (having moved from Stamford, Connecticut, in October 2007), though it is incorporated in New York (state), New York with its largest population of employees based around Rochester, New York, the area in which the company was founded. The company purchased Affiliated Computer Services for $6.4 billion in early 2010. As a large developed company, it is consistently placed in the list of Fortune 500 companies. On December 31, 2016, Xerox separated its business process service operations, essentially those operations acquired with the purchase of Affiliated Computer Services, into a new publicly traded company, Conduent. Xerox focuses on its document technology and document outsourcing business, and traded on the NYSE from 1961 to 2021, and the N ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Photoconductor
Photoconductivity is an optical and electrical phenomenon in which a material becomes more electrically conductive due to the absorption of electromagnetic radiation such as visible light, ultraviolet light, infrared light, or gamma radiation. When light is absorbed by a material such as a semiconductor, the number of free electrons and holes increases, resulting in increased electrical conductivity. To cause excitation, the light that strikes the semiconductor must have enough energy to raise electrons across the band gap, or to excite the impurities within the band gap. When a bias voltage and a load resistor are used in series with the semiconductor, a voltage drop across the load resistors can be measured when the change in electrical conductivity of the material varies the current through the circuit. Classic examples of photoconductive materials include: * photographic film: Kodachrome, Fujifilm, Agfachrome, Ilford, ''etc.'', based on silver sulfide and silver bromide. * the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
IBM 6670
The IBM 6670 Information Distributor (6670-001) was a combination laser printer and photocopier introduced by IBM. Announced on February 14, 1979, as part of Office System/6, its feature set included two-sided printing. ''The New York Times'' described it in 1979 as "A key component of the office of tomorrow." Although Wang was first to market an ''Intelligent copier'', the 6670 is "closer to the standard envisioned." The IBM 6670 Information Distributor and its Collator unit (the IBM 6671) were withdrawn from marketing on November 19, 1986. History IBMs goal with the 6670 was to produce: "A high-speed copying machine that can be linked electronically to computers, word-processing typewriters and other automated office equipment" The IBM 6670 was essentially a half speed IBM Series III Copier Model 10 to which a laser imaging system and associated electronics was added. Due to the speed of available solid state logic at that time, it was necessary to run the photoconductor ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kanji
are the logographic Chinese characters taken from the Chinese family of scripts, Chinese script and used in the writing of Japanese language, Japanese. They were made a major part of the Japanese writing system during the time of Old Japanese and are still used, along with the subsequently-derived syllabic scripts of ''hiragana'' and ''katakana''. The characters have Japanese pronunciation, pronunciations; most have two, with one based on the Chinese sound. A few characters were invented in Japan by constructing character components derived from other Chinese characters. After World War II, Japan made its own efforts to simplify the characters, now known as shinjitai, by a process similar to China's simplified Chinese characters, simplification efforts, with the intention to increase literacy among the common folk. Since the 1920s, the Japanese government has published character lists periodically to help direct the education of its citizenry through the myriad Chinese characte ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Xerox 9700
The Xerox 9700 was a high-end laser printer manufactured by Xerox Corporation beginning in 1977. Based on the Xerox 9200 copier, the 9700 printed at 300 dots-per-inch on cut-sheet paper at up to two pages per second (pps), one- or two-sided, that is simplex or duplex, landscape or portrait. Description The 9700 was intended for high-volume applications. It included a disk drive and a modified Digital Equipment Corporation (DEC) PDP-11/34 as a print controller and rasterizer. It could connect to an IBM mainframe via a parallel channel. It offered an input tray that could hold up to 2500 sheets of paper (20lb bond/75gsm) and an auxiliary input tray for an additional 400 sheets. It had two output stackers, each capable of holding 1500 sheets. An operator control console consisted of a CRT display terminal and keyboard. It optionally included a 9 track tape drive which could be used to load documents for printing, to supply software and bitmapped fonts, or run backups. Histo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Honeywell Page Printing System
The Honeywell Page Printing System (PPS) announced in 1974, is notable because it was the first commercially successful high speed non-impact printer. It could produce output at up to 18,000 lines per minute, where the earlier Xerox 1200 (the first commercially available electro-static printer) ran at 4000 lines per minute and the contemporary IBM 3211 (which was an impact printer), ran at 2000 lines per minute. Most printer history has focused on the later IBM 3800 and the Xerox 9700. Development The PPS was designed by Honeywell Information Systems (HIS) in Oklahoma City. Development began in 1967, under a team led by Ronald F Borelli. Their initial goal was to exceed 5,000 lines per minute and after six years of development, they shipped their first pre-production unit to Lawrence Livermore Lab in 1973. It was able to run at 18,000 lines per minute. Honeywell had three primary goals with the PPS: * Speed: The goal was to be significantly faster than current print ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Xerox 1200
The Xerox 1200 Computer Printing System is significant as being the first commercial non-impact Xerographic printer used to create computer output. It is sometimes mistakenly referred to as a laser printer, but it did not in fact have a laser. Development The printing system was developed by Xerox and announced in May 1973. It was first shipped in mid to late 1974. It was based on the Xerox 3600 Copier, which was initially released in 1968 as a 60-page per minute copier with a 2000 sheet paper tray. It used a selenium photoconductor drum with characters positioned in a manner similar to a line printer. It used an optical character generator designed by optical engineer Phil Chen. Characteristics The 1200 Computer Printing System was available in both an offline and an online model: * The Model 1 is an offline version and took output from 800 or 1600 BPI 9 track magnetic tapes made on IBM systems or Univac Series 70 Systems. In May 1975 a software update added support ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
