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An original DECwriter is connected to this PDP-11/40 minicomputer. The original DECwriter was introduced in November 1970 at the Fall Joint Computer Conference. [1] [a] Also known by its model number, LA30, it was one of the earliest dot matrix printers to be introduced to market, only months after the seminal Centronics 101 that May at the Spring Joint Computer Conference.
Troubleshooting is a form of problem solving, often applied to repair failed products or processes on a machine or a system. It is a logical, systematic search for the source of a problem in order to solve it, and make the product or process operational again. Troubleshooting is needed to identify the symptoms.
There is an increasing trend for new photocopiers to implement digital technology, thereby replacing the older analog technology. With digital copying, the copier effectively consists of an integrated scanner and laser printer. This design has several advantages, such as automatic image-quality enhancement and the ability to "build jobs" (that ...
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The earliest digital reference services were launched in the mid-1980s, primarily by academic and medical libraries, and provided by e-mail.These early-adopter libraries launched digital reference services for two main reasons: to extend the hours that questions could be submitted to the reference desk, and to explore the potential of campus-wide networks, which at that time was a new technology.
In 1975, Centronics formed an OEM agreement with Tandy and produced DMP and LP series printers for several years. The 6000 series band printers were introduced in 1978. By 1979 company revenues were over $100 million. In 1980, the Mini-Printer Model 770 was introduced—a small, low-cost desktop serial matrix printer. This was the first printer ...
The Digital Reader 1000 (DR1000) was an e-Book reading device produced by iRex in the Netherlands. Production ceased in 2010, when iRex filed for bankruptcy . [ 1 ] The DR1000 was produced with a 10.2-inch (25.9 cm) e-ink display.
The printing speed of serial dot matrix printers with moving heads varies from 30 [34] to 1550 characters per second (cps). [35] In a considerably different configuration, so called line dot matrix printers [36] or line matrix printers use a fixed print head almost as wide as the paper path utilizing a horizontal line of thousands of pins for ...
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