personal digital assistant

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Note: are not considered to be network workstations client workstations on the network are capable of running programs independently of the server, but a terminal is not capable of independent processing. Mainframes typically cost several hundred thousand dollars. These small devices also often possessed a communications component and benefited from the sudden popularization of the Internet and the.

Minicomputers Workstation computer A minicomputer is a multi-user computer that is less powerful than a mainframe. The niche previously filled by the minicomputer has been largely taken over by high-end microcomputer workstations serving multiple users see above.

personal digital assistant

Computer Terminology - Computer Types Computer Concepts and Terminology Types Types of Computers Links to topics on this page: Computers come in a variety of types designed for different purposes, with different capabilities and costs. Microcomputers A microcomputer is a computer that has a chip or multiple microprocessors as its CPU. They are more commonly called personal computers because they are designed to be used by one person at a time. Personal computers are typically used at home, at school, or at a business. Popular uses for microcomputers include word processing, surfing the Web, sending and receiving e-mail, spreadsheet calculations, database management, editing photographs, creating graphics, and playing music or games. Personal computers come in two major varieties, desktop computers and notebook computers: Desktop computers are larger and not meant to be portable. They usually sit in one place on a desk or table and are plugged into a wall outlet for power. The case of the computer holds the , , power supply, and. This case may lay flat on the desk, or it may be a tower that stands vertically on the desk or under it. The computer usually has a separate monitor either a or although some designs have a display built into the case. A separate keyboard and mouse allow the user to input data and commands. Desktop personal computer Notebook or laptop computers are small and lightweight enough to be carried around with the user. They run on battery power, but can also be plugged into a wall outlet. They typically have a built-in display that folds down to protect the display when the computer is carried around. They also feature a built-in keyboard and some kind of built-in such as a touch pad. While some laptops are less powerful than typical desktop machines, this is not true in all cases. Laptops, however, cost more than desktop units of equivalent processing power because the smaller components needed to build laptops are more expensive. There are also less-powerful versions of notebook computers called subnotebooks, and netbooks that are used mainly to access the Internet. Tablet Computers and Smartphones A Tablet Computer often just called a tablet generally has the format of a handheld slate consisting of a large LCD touchscreen used for both input and output. Tablets run applications specifically designed for these touchscreen devices, but they also can do some activities such as word processing or spreadsheets, although the lack of a physical keyboard usually makes such activities more cumbersome on tablets than they are on desktop or notebook machines. Examples of tablet computers include the Apple iPad and machines from various manufacturers that run the Android OS. Smartphones are high-end mobile phones that typically run operating systems similar to the tablet computers discussed above, so they often share the same applications as tablets. They combine the features of a mobile phone, PDA see below , camera, music player, GPS device, etc. Many smartphones use a touchscreen for input, but some include physical keyboards. PDAs and Palmtop Computers A Personal Digital Assistant PDA is a handheld microcomputer that trades off power for small size and greater portability. They typically use a touch-sensitive LCD screen for both output and input the user draws characters and presses icons on the screen with a stylus. PDAs communicate with desktop computers and with each other either by cable connection, infrared IR beam, or radio waves. PDAs are normally used to keep track of appointment calendars, to-do lists, address books, and for taking notes. A palmtop or handheld PC is a very small microcomputer that also sacrifices power for small size and portability. These devices typically look more like a tiny laptop than a PDA, with a flip-up screen and small keyboard. They may use Windows CE or similar operating system for handheld devices. Some PDAs and palmtops contain wireless networking or cell phone devices so that users can check e-mail or surf the web on the move. They contain one or more microprocessor CPUs. They may be used by a single-user for applications requiring more power than a typical PC rendering complex graphics, or performing intensive scientific calculations. Alternately, workstation-class microcomputers may be used as server computers that supply files to client computers over a. This class of powerful microcomputers can also be used to handle the processing for many users simultaneously who are connected via ; in this respect, high-end workstations have essentially supplanted the role of minicomputers see below. Note: are not considered to be network workstations client workstations on the network are capable of running programs independently of the server, but a terminal is not capable of independent processing. There are classes of computers that are not microcomputers. These include supercomputers, mainframes, and minicomputers. Minicomputers Workstation computer A minicomputer is a multi-user computer that is less powerful than a mainframe. The niche previously filled by the minicomputer has been largely taken over by high-end microcomputer workstations serving multiple users see above. Mainframes A mainframe computer is a large, powerful computer that handles the processing for many users simultaneously up to several hundred users. Users connect to the mainframe using terminals and submit their tasks for processing by the mainframe. The processing power of the mainframe is time-shared between all of the users. Mainframes typically cost several hundred thousand dollars. They are used in situations where a company wants the processing power and information storage in a centralized location. Mainframes are also now being used as high-capacity for networks with many client workstations or for serving files over the Internet. Supercomputers Mainframe computer this IBM z-series computer is about 6 feet tall A supercomputer is mainframe computer that has been optimized for speed and processing power. The most famous series of supercomputers were designed by the company founded and named after Seymour Cray. The Cray-1 was built in the 1976 and installed at Los Alamos National Laboratory. Supercomputers are used for extremely calculation-intensive tasks such simulating nuclear bomb detonations, aerodynamic flows, and global weather patterns. A supercomputer typically costs several million dollars. Recently, some supercomputers have been constructed by connecting together large numbers of individual processing units in some cases, these processing units are standard microcomputer hardware. Please note: All of this talk of which computers are more powerful than others i. However, all classes of computers are becoming more powerful with time as technology improves. The microprocessor chip in a handheld calculator is more powerful than the was, and your desktop computer has more processing power than the first supercomputers did. Microprocessor chips are found in many electronic devices in your iPod, in your DVD player, in your microwave, in your car, in your phone. These are special-purpose computers that run programs to control the equipment and optimize its performance. Copyright © 2004 by Last update: August 29, 2016 7:25 PM.

The picture is the Tungsten E2 and an example of a PDA. Jesus of tablet computers include the Apple iPad and machines from various manufacturers that run the Android OS. Personal computers come in two major varieties, desktop computers and notebook computers: Desktop computers are larger and not meant to be portable. Tablets run applications specifically designed for these touchscreen elements, but they also can do some activities such as word processing or spreadsheets, although the lack of a physical keyboard usually makes such activities more cumbersome on tablets than they are on desktop or notebook machines. A supercomputer typically costs several million dollars. Supercomputers Mainframe computer this IBM z-series la is about 6 feet tall A supercomputer is mainframe computer that has been optimized for speed and processing power. They combine the features of a mobile phone, PDA see belowcamera, music player, GPS device, etc. pda in computer terminology There are also less-powerful versions of notebook computers called subnotebooks, and netbooks that are solo mainly to access the Internet. They contain one or more microprocessor CPUs. They usually sit in one place on a desk or table and are plugged into a wall outlet for power. They also feature a built-in keyboard and some kind of built-in such as a north pad.