IBM 2260 video display terminal The text-only monochrome IBM 2260 cathode ray tube (CRT) video display terminal (Display Station) plus keyboard was a 1964 predecessor to the more-powerful IBM 3270 terminal line which eventually was extended to support color text and graphics. There were three models of 2260. Model 1 displayed 240 characters, formatted as six rows of forty characters. Model 2 displayed 480 characters, formatted as twelve rows of forty characters. Model 3 displayed 960 characters, formatted as twelve rows of eighty characters.
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Lear Siegler, Inc. (LSI) manufactured its first video display terminal in 1972 – the 7700A. In 1973 LSI hired a new head of engineering, Jim Placak. He and his team created the ADM-1 in late '73.
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The VT100 series was replaced by the VT200 series starting in 1983, which proved just as successful. Ultimately, over six million terminals in the VT series were sold, based largely on the success of the VT100s."VT 510/520 Video Display Terminal", Boundless Technologies.
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The ADM-3A was an influential early video display terminal, introduced in 1976. It was manufactured by Lear Siegler and had a 12-inch screen displaying 12 or 24 lines of 80 characters. It set a new industry low single unit price of $995. Its "dumb terminal" nickname came from some of the original trade publication advertisements.
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Atex was founded in Massachusetts in 1973 by Douglas Drane and Charles and Richard Ying, graduates of MIT, who had an idea for a new type of electronic composition system. By 1974 they had created a prototype video display terminal, encased in a cardboard whiskey carton. The weekly news magazine US News & World Report was their first customer and an early investor. By 1977, Atex had successfully connected reporters and editors via a paper-free system that allowed working on-screen instead of on typewriters.
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The company flourished into the 1980s as a United States Federal defense contractor with particular success as a designer and manufacturer of "Identification Friend or Foe" (IFF) military detection and identification systems. During the 1970s, as an outgrowth of its defense work, Hazeltine Corp. developed the Hazeltine Terminal, "Hazeltine H1500 Video Display Terminal Reference Manual", Hazeltine Corporation, July 1977 an early monochrome smart terminal. Several improved models followed, including the popular Hazeltine 1500, which found use in the emerging microcomputer market in the late 1970s.
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ADM-3A keyboard layout HJKL is a layout used in the Unix computer world, a practice spawned by its use in the vi text editor. The editor was written by Bill Joy for use on a Lear-Siegler ADM-3A terminal, which places arrow symbols on these letters since, it did not have dedicated arrow keys on the keyboard. These correspond to the functions of the corresponding control characters , , , and when sent to the terminal, moving the cursor left, down, up, and right, respectively.Tenth Anniversary ADM 3A Dumb Terminal Video Display Terminal User's Reference Manual, p.
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Apollo 11 video display terminal with a slashed Oh IBM (and a few other early mainframe makers) used a convention in which the letter O had a slash and the digit 0 did not."BASIC" 1964 document with many examples of this in the code. This is even more problematic for Danes, Faroese, and Norwegians because it means two of their letters—the O and slashed O (Ø)—are visually similar. This was later flipped and most mainframe chain or band printers used the opposite convention (letter O printed as is, and digit zero printed with a slash Ø). This was the de facto standard from 1970s to 1990s.
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The MCC-16 supported both the Univac standard terminal (from RCA) renamed to the Uniscope Video Display Terminal or VDT, as well as ordinary ASCII dumb terminals. Univac's Uniscope VDT provided sophisticated (for the time) editing capability including the ability to edit text on screen and make changes a line at a time or a page at a time, then transmit the text back to the computer. The VDT also supported direct cursor positioning and input protection through a cursor which indicated that only text after the cursor was to be recognized. It also supported special scroll mode in a subset of the screen, or "window" in which, instead of the entire screen scrolling upward when the last line is displayed, it was possible to make the scroll area only the bottom half of the screen.
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The first computer monitors used cathode ray tubes (CRTs). Prior to the advent of home computers in the late 1970s, it was common for a video display terminal (VDT) using a CRT to be physically integrated with a keyboard and other components of the system in a single large chassis. The display was monochrome and far less sharp and detailed than on a modern flat-panel monitor, necessitating the use of relatively large text and severely limiting the amount of information that could be displayed at one time. High-resolution CRT displays were developed for the specialized military, industrial and scientific applications but they were far too costly for general use. Some of the earliest home computers (such as the TRS-80 and Commodore PET) were limited to monochrome CRT displays, but colour display capability was already a standard feature of the pioneering Apple II, introduced in 1977, and the speciality of the more graphically sophisticated Atari 800, introduced in 1979.
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Automobile manufacturers, such as General Motors and Visteon, also employ residents. Nickels Arcade interior, looking towards the east High tech companies have located in the area since the 1930s, when International Radio Corporation introduced the first mass- produced AC/DC radio (the Kadette, in 1931) as well as the first pocket radio (the Kadette Jr., in 1933). The Argus camera company, originally a subsidiary of International Radio, manufactured cameras in Ann Arbor from 1936 to the 1960s. Current firms include Arbor Networks (provider of Internet traffic engineering and security systems), Arbortext (provider of XML-based publishing software), JSTOR (the digital scholarly journal archive), MediaSpan (provider of software and online services for the media industries), Truven Health Analytics, and ProQuest, which includes UMI. Ann Arbor Terminals manufactured a video-display terminal called the Ann Arbor Ambassador during the 1980s. Barracuda Networks, which provides networking, security, and storage products based on network appliances and cloud services, opened an engineering office in Ann Arbor in 2008 on Depot St. and currently occupies the building previously used as the Borders headquarters on Maynard Street.
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