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  • Dot matrix printer

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    Epson MX-80, a classic model that remained in use for many years. IBM sold it as their IBM 5152. A dot matrix printer is an impact printer that prints using a fixed number of pins or wires. In contrast, inkjet and laser printers technically exhibit dot matrix printing, but they are not considered "dot matrix printers". Impact vs. non-impact is one way in which printers are divided into two classes. Dot-matrix impact printers, "the most common type still sold as of October of 2012," use "a vertical column of pins which fire" (and thus force contact between the paper and "an ink-soaked ribbon").

  • Personal digital assistant

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    The Palm TX Apple Newton MessagePad (1993) – Computer History Museum A personal digital assistant (PDA), also known as a handheld PC, is a variety mobile device which functions as a personal information manager. PDAs were largely discontinued in the early 2010s after the widespread adoption of highly capable smartphones, in particular those based on iOS and Android. Nearly all PDAs have the ability to connect to the Internet. A PDA has an electronic visual display, letting it include a web browser. Most models also have audio capabilities, allowing usage as a portable media player, and also enabling most of them to be used as telephones. Most PDAs can access the Internet, intranets or extranets via Wi-Fi or Wireless Wide Area Networks. Sometimes, instead of buttons, PDAs employ touchscreen technology. The technology industry has recently recycled the term personal digital assistance. The term is more commonly used for software that identifies a user's voice to reply to the queries. The first PDA, the Organizer, was released in 1984 by Psion, followed by Psion's Series 3, in 1991. The latter began to resemble the more familiar PDA style, including a full keyboard. The term PDA was first used on January 7, 1992 by Apple Computer CEO John Sculley at the Consumer Electronics Show in Las Vegas, Nevada, referring to the Apple Newton. In 1994, IBM introduced the first PDA with full telephone functionality, the IBM Simon, which can also be considered the first smartphone. Then in 1996, Nokia introduced a PDA with telephone functionality, the 9000 Communicator, which became the world's best-selling PDA. Another early entrant in this market was Palm, with a line of PDA products which began in March 1996.

  • Emulator

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    DOSBox emulates the command-line interface of DOS. In computing, an emulator is hardware or software that enables one computer system (called the host) to behave like another computer system (called the guest). An emulator typically enables the host system to run software or use peripheral devices designed for the guest system. Emulation refers to the ability of a computer program in an electronic device to emulate (or imitate) another program or device. Many printers, for example, are designed to emulate Hewlett-Packard LaserJet printers because so much software is written for HP printers. If a non-HP printer emulates an HP printer, any software written for a real HP printer will also run in the non-HP printer emulation and produce equivalent printing. Since at least the 1990s, many video game enthusiasts have used emulators to play classic (and/or forgotten) arcade games from the 1980s using the games' original 1980s machine code and data, which is interpreted by a current-era system. A hardware emulator is an emulator which takes the form of a hardware device.

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