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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. used computer recycling used computer recycling notebook computers Green computing is the study and practice of using computing resources efficiently. Typically, technological systems or computing products that incorporate green computing principles take into account the so-called triple bottom line of economic viability, social responsibility, and environmental impact. This differs somewhat from traditional or standard business practices that focus mainly on the economic viability of a computing solution. These focuses are similar to those of green chemistry; reduction of the use of hazardous materials such as lead at the manufacturing stage, maximized energy efficiency during the product's term of use, and recyclables or biodegradability of both a defunct product and of any factory waste. There are two common household methods of recycling cheap pc Kylie Minogue sell my computer sell my computer desktop computers Desktops are currently the most affordable computers and ubiquitous in businesses, schools, and households; they are used for performing office tasks, organizing digital photos, video editing, and Internet access. Nearly all desktop computers are modular, with components that can easily be replaced or upgraded. The ability to store and execute lists of instructions called programs makes computers extremely versatile and distinguishes them from calculators computer recycling Keira Knightley high tech recycle high tech recycle computer notebooks Computer recycling refers to any process by which a computer and other electronic devices are disposed of in a safe manner that prevents it from going to waste or becoming an environmental health hazard. This can include finding another use for the system or having the system dismantled in a manner that allows for the safe extraction of the constituent materials for reuse in other products. Voluntary liquidation begins when the company passes the resolution, and the company will generally cease to carry on business at that time (if it has not done so already) computer sale Katherine Heigl sell your lap top sell your lap top buy computer Does Recycling Save money? The liquidators would normally require sanction to pay creditors and to make compromises or arrangement with creditors computer sales Kim Kardashian surplus computer surplus computer laptop computer Economist Steven Lands burg has suggested that the sole benefit of reducing landfill space is trumped by the energy needed and resulting pollution from the recycling process. Others, however, have calculated through life cycle assessment that producing recycled paper uses less energy and water than harvesting, pulping, processing, and transporting virgin trees. By using less recycled paper, additional energy is needed to create and maintain farmed forests until these forests are as self-sustainable as virgin forests. This argument is followed from the curbside collection of recyclables, which critics note is often done by a second waste truck in addition to the truck that picks up the regular trash computers for sale Kirsten Dunst sell my laptop sell my laptop computer laptops Does recycling Save energy? There is controversy on just how much energy is saved through recycling. The EIA states on its website that "a paper mill uses 40 percent less energy to make paper from recycled paper than it does to make paper from fresh lumber." Critics often argue that in the overall processes, it can take more energy to produce recycled products than it does to dispose of them in traditional landfill methods. This argument is followed from the curbside collection of recyclables, which critics note is often done by a second waste truck in addition to the truck that picks up the regular trash. The EIA states on its website that a paper mill uses 40 percent less energy to make paper from recycled paper than it does to make paper from fresh lumber discount computer |
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