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HPGL
HP-GL, short for Hewlett-Packard Graphics Language and often written as HPGL, is a printer control language created by Hewlett-Packard (HP). HP-GL was the primary printer control language used by HP plotters. It was introduced with the plotteHP-8972in 1977 and became a standard for almost all plotters. Hewlett-Packard's printers also usually support HP-GL/2 in addition to PCL. Design The language is formed from a series of two letter codes (mnemonics), followed by optional parameters. For instance an arc can be drawn on a page by sending the string: AA100,100,50; This means ''Arc Absolute'', and the parameters place the center of the arc at absolute coordinates 100,100 on the page, with a starting angle of 50 degrees measured counter-clockwise. A fourth optional parameter (not used here) specifies how far the arc continues, and defaults to 5 degrees. When first introduced, HP-GL contained the following commands: Formats: * integer formats between -32767 and 32768. N ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Plotter
A plotter is a machine that produces vector graphics drawings. Plotters draw lines on paper using a pen, or in some applications, use a knife to cut a material like vinyl or leather. In the latter case, they are sometimes known as a cutting plotter. In the past, plotters were used in applications such as computer-aided design, as they were able to produce line drawings much faster and of a higher quality than contemporary conventional printers. Smaller desktop plotters were often used for business graphics. Printers with graphics capabilities took away some of the market by the early 1980s, and the introduction of laser printers in the mid-1980s largely eliminated the use of plotters from most roles. Plotters retained a niche for producing very large drawings for many years, but have now largely been replaced by wide-format conventional printers. Cutting plotters remain in use in a number of industries. Overview Digitally controlled plotters evolved from earlier fully analog ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Printer Control Language
In digital printing, a page description language (PDL) is a computer language that describes the appearance of a printed page in a higher level than an actual output bitmap (or generally raster graphics). An overlapping term is printer control language, which includes Hewlett-Packard's Printer Command Language (PCL). PostScript is one of the most noted page description languages. The markup language adaptation of the PDL is the page description markup language. Page description languages are text (human-readable) or binary data streams, usually intermixed with text or graphics to be printed. They are distinct from graphics application programming interfaces (APIs) such as GDI and OpenGL that can be called by software to generate graphical output. Notable examples Various page description languages exist: * AFP, Advanced Function Presentation ( IBM) * Apple Raster, formerly known as URF, used by the AirPrint protocol. * Canon GARO, Graphic Arts language with Raster Operations (fo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Binary File
A binary file is a computer file that is not a text file. The term "binary file" is often used as a term meaning "non-text file". Many binary file formats contain parts that can be interpreted as text; for example, some computer document files containing formatted text, such as older Microsoft Word document files, contain the text of the document but also contain formatting information in binary form. Structure Binary files are usually thought of as being a sequence of bytes, which means the binary digits (bits) are grouped in eights. Binary files typically contain bytes that are intended to be interpreted as something other than text characters. Compiled computer programs are typical examples; indeed, compiled applications are sometimes referred to, particularly by programmers, as binaries. But binary files can also mean that they contain images, sounds, compressed versions of other files, etc. – in short, any type of file content whatsoever. Some binary files contain ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
HP Software
Micro Focus International plc is a British multinational software and information technology business based in Newbury, Berkshire, England. The firm provides software and consultancy. The company is listed on the London Stock Exchange and is a constituent of the FTSE 250 Index. History Micro Focus was founded in 1976. In 1981, it became the first company to win the Queen's Award for Industry purely for developing a software product. The product was CIS COBOL, a standard-compliant COBOL implementation for microcomputers. In 1998, the company acquired Intersolv Inc, an applications enablement business, for and the combined business was renamed Merant. The same year the company acquired XDB Systems with their XDB Enterprise Server relational database management system. In 2001 the business was demerged from Merant with help from Golden Gate Capital Partners and once again became Micro Focus. It was listed on the London Stock Exchange in 2005. In May 2007, San Diego-based Acu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Addison-Wesley Publishing Company
Addison-Wesley is an American publisher of textbooks and computer literature. It is an imprint of Pearson PLC, a global publishing and education company. In addition to publishing books, Addison-Wesley also distributes its technical titles through the O'Reilly Online Learning e-reference service. Addison-Wesley's majority of sales derive from the United States (55%) and Europe (22%). The Addison-Wesley Professional Imprint produces content including books, eBooks, and video for the professional IT worker including developers, programmers, managers, system administrators. Classic titles include ''The Art of Computer Programming'', ''The C++ Programming Language'', ''The Mythical Man-Month'', and ''Design Patterns''. History Lew Addison Cummings and Melbourne Wesley Cummings founded Addison-Wesley in 1942, with the first book published by Addison-Wesley being Massachusetts Institute of Technology professor Francis Weston Sears' ''Mechanics''. Its first computer book was ''Progra ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hewlett-Packard Company
The Hewlett-Packard Company, commonly shortened to Hewlett-Packard ( ) or HP, was an American multinational information technology company headquartered in Palo Alto, California. HP developed and provided a wide variety of hardware components, as well as software and related services to consumers, small and medium-sized businesses ( SMBs), and large enterprises, including customers in the government, health, and education sectors. The company was founded in a one-car garage in Palo Alto by Bill Hewlett and David Packard in 1939, and initially produced a line of electronic test and measurement equipment. The HP Garage at 367 Addison Avenue is now designated an official California Historical Landmark, and is marked with a plaque calling it the "Birthplace of 'Silicon Valley'". The company won its first big contract in 1938 to provide test and measurement instruments for Walt Disney's production of the animated film ''Fantasia'', which allowed Hewlett and Packard to formally esta ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hewlett-Packard Journal
''Hewlett-Packard Journal'' was a magazine published by Hewlett-Packard (HP) between 1949–1998. The first issue appeared in September 1949. Headquartered in Palo Alto, California Palo Alto (; Spanish language, Spanish for "tall stick") is a charter city in the northwestern corner of Santa Clara County, California, United States, in the San Francisco Bay Area, named after a Sequoia sempervirens, coastal redwood tree kno ..., it covered technical and product news from HP. The magazine was started as monthly, but then its frequency switched to bimonthly. It is available as web-pages - or as scanned and available on HPs home page as PDF downloads. References {{Reflist External links leapsecond.com: Time & Frequency Articles from ''Hewlett Packard Journal'' Bimonthly magazines published in the United States Monthly magazines published in the United States Defunct computer magazines published in the United States Hewlett-Packard Magazines disestablished in 1998 Magazines e ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Logo (programming Language)
Logo is an educational programming language, designed in 1967 by Wally Feurzeig, Seymour Papert, and Cynthia Solomon. ''Logo'' is not an acronym: the name was coined by Feurzeig while he was at Bolt, Beranek and Newman, and derives from the Greek ''logos'', meaning ''word'' or ''thought''. A general-purpose language, Logo is widely known for its use of turtle graphics, in which commands for movement and drawing produced line or vector graphics, either on screen or with a small robot termed a Turtle (robot), turtle. The language was conceived to teach concepts of programming related to Lisp (programming language), Lisp and only later to enable what Papert called "kinesthetic, body-syntonic reasoning", where students could understand, predict, and reason about the turtle's motion by imagining what they would do if they were the turtle. There are substantial differences among the many dialects of Logo, and the situation is confused by the regular appearance of turtle graphics program ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
ShareCAD
ShareCAD or ShareCAD.org is a free online service aimed at viewing different DWG and CAD formats as well as 3D models in a web browser. The service doesn't require any installation or registration and enables users to view vector, raster, and 3D formats online. ShareCAD also offers its users a free iframe plugin for viewing DWG at a site. The service runs in web browsers powered by Windows, OS X, Linux, Android, iOS, and Windows Phone and is available in the following languages: English, German, French, Italian, Spanish, Portuguese, and Russian. Features ShareCAD enables users to view CAD drawings in web browsers online without installation of any desktop software. The service not only displays drawings but also offers such features as access to layers, zooming, 3D orbit etc. To view drawings in more details, the user can change the background color (black or white background). Moreover, the drawing can be printed out. The link for the uploaded drawing remains valid for 24 h ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gerber Format
The Gerber format is an open format, open ASCII file formats#Vector formats, vector format for printed circuit board (PCB) designs. It is the de facto standard used by PCB industry software to describe the printed circuit board images: copper layers, solder mask, legend, drill data, etc. The official website contains the specification, test files, notes and the Reference Gerber Viewer to support users and especially developers of Gerber software. Gerber is used in PCB fabrication data. PCBs are designed on a specialized electronic design automation (EDA) or a Printed circuit board#Design, computer-aided design (CAD) system. The CAD systems output PCB fabrication data to allow fabrication of the board. This data typically contains a Gerber file for each image layer (copper layers, solder mask, Printed circuit board#Legend printing, legend or silk...). Gerber is also the standard image input format for all bare board fabrication equipment needing image data, such as photoplotters, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
DMPL
DMPL, or Digital Microprocessor Plotter Language, is a vector graphics file format from Houston Instruments developed to control pen plotters and later used on cutting plotters. Driver This language is not compatible with HP-GL, see its EAGLE definition: IDMPType = PenPlotter Long = "Houston Instrument DMP plotter" Init = ";:H A EC1 \n" Reset = "P0 @\n" Width = 16 Height = 11 ResX = 1000 ResY = 1000 PenSelect = "P%u\n" PenSpeed = "V%1.0f\n" Move = "U %d,%d\n" Draw = "D %d,%d\n" PenCircleCxCyRxRy = "CA %d,%d 360\n" See also * Roland DXY-800 is a Japanese manufacturer of electronic musical instruments, electronic equipment, and software. It was founded by Ikutaro Kakehashi in Osaka on 18 April 1972. In 2005, its headquarters relocated to Hamamatsu in Shizuoka Prefecture. It has fa ..., a commonly used plotter for EDA software utilizing yet another plotter language called ''DXY-GL''. External links Sample DMPL filesDMPL Commands ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Minicomputer
A minicomputer, or colloquially mini, is a class of smaller general purpose computers that developed in the mid-1960s and sold at a much lower price than mainframe and mid-size computers from IBM and its direct competitors. In a 1970 survey, ''The New York Times'' suggested a consensus definition of a minicomputer as a machine costing less than (), with an input-output device such as a teleprinter and at least four thousand words of memory, that is capable of running programs in a higher level language, such as Fortran or BASIC. The class formed a distinct group with its own software architectures and operating systems. Minis were designed for control, instrumentation, human interaction, and communication switching as distinct from calculation and record keeping. Many were sold indirectly to original equipment manufacturers (OEMs) for final end use application. During the two decade lifetime of the minicomputer class (1965–1985), almost 100 companies formed and only a half ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
