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Go GreenPCA personal computer (PC) is a computer whose original sales price, size, and capabilities make it useful for individuals, intended to be operated directly by an end user, with no intervening computer operator. A personal computer may be a home computer, or may be found in an office, often connected to a local area network. The distinguishing characteristics are that the computer is used only (or mostly) by one person at a time, in a very interactive fashion. This is opposite to the batch processing or time-sharing models which allowed large expensive systems to be used by many people, usually at the same time, or large data processing systems which required a full-time staff to operate efficiently. The capabilities of a personal computer have changed greatly since the introduction of electronic computers. By the early 1970s, people in academic or research institutions had the opportunity for single-person use of a computer system in interactive mode for extended durations, although these systems would still have been too expensive to be owned by a single person. The introduction of the microprocessor, a single chip with all the circuitry that formerly occupied large cabinets, lead to the proliferation of personal computers after about 1975. Early personal computers generally called microcomputers, sold often in kit form and in limited volumes, and were of interest mostly to hobbyists and technicians. By the late 1970s, mass-market pre-assembled computers allowed a wider range of people to use computers, focusing more on software applications and less on development of the processor hardware. Throughout the 1970s and 1980s, home computers were developed for household use, offering personal productivity, programming and games. Somewhat larger and more expensive systems (although still low-cost compared with minicomputers and mainframes) were aimed for office and small business use. Workstations are characterized by high-performance processors and graphics displays, with large local disk storage, networking capability, and running under a multitasking operating system. Workstations are still used for tasks such as computer-aided design, drafting and modeling, computation-intensive scientific and engineering calculations, image processing, architectural modelling, and computer graphics for animation and motion picture visual effects. Eventually the market segments lost any technical distinction; business computers acquired color graphics capacity and sound, and home computers and game systems used the same processors and operating systems as office-bound computers. Mass-market computers had graphics and memory comparable to dedicated workstations of a few years before. Even local area networking, originally a way to allow business computers to share expensive mass storage and peripherals, became a standard feature of a home computer. computer donation used phones computers computer recycle computer recycle Cisco Liquidation Diane Kruger nationwide used computer used network hardware laptop computers computer recycling nationwide computer recycling nationwide Cisco routers Drew Barrymore nationwide used computer used network hardware computer notebooks high tech recycle high tech recycle Cisco Switch Elisabeth Shue used Cisco forum used network equipment recycling hi tech recycle hi tech recycle computer Elisha Cuthbert used Cisco router used juniper equipment recycle recycling computer recycling computer closeout Elizabeth Hurley used foundry networks used foundry networks desktop computers sell my computer sell my computer recycling centers Elsa Pataky used juniper equipment used Cisco router computer laptops sell my laptop sell my laptop recycling center Erika Eleniak used network equipment used test equipment buy computer sell your lap top sell your lap top recycling Eva Green used network hardware nationwide used computer laptop computer surplus computer surplus computer recycle symbol Eva Longoria used network hardware used surplus computers computer monitors used Cisco buyer used Cisco buyer Cisco Liquidation Famke Janssen used phones used Cisco forum notebook computers used computer recycling used computer recycling Cisco routers Free Photos used sun systems used sun systems liquidators Nova Scotia Blues and Blues Boogie surplus computer Cisco Switch Gillian Anderson used surplus computers nationwide used computer liquidation Nunavut Used sell my computer Brittany good used test equipment computer donation recycling centers Ohio computer recycling computer closeout Brittany Murphy |
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