Computer

A computer is a device or for processing information from data according to a program — a compiled list of instructions. The information to be processed may represent numbers, text, pictures, or sound, amongst many other types.

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Computers are extremely versatile. In fact, they are universal information processing machines. According to the Church-Turing thesis, a computer with a certain minimum threshold capability (in technical terms, one way to describe this is that the machine must have the ability to emulate a universal Turing machine) is in principle capable of performing the tasks of any other computer, from those of a personal digital assistant to a supercomputer. Therefore, the same computer designs have been adapted for tasks from processing company payrolls to controlling industrial robots. Modern electronic computers also have enormous speed and capacity for information processing compared to earlier designs, and they have become exponentially more powerful over the years. This process was dubbed Moore's Law.

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Computers are present in a variety of physical packages. The original computers were the size of a large room, and such enormous computing facilities still exist for specialised scientific computation - supercomputers - and for the transaction processing requirements of large companies, generally called mainframes. Smaller computers for individual use, called personal computers, are perhaps the form most people are most familiar with, and their portable equivalent the notebook computer. However, the most common form of computer in use today is the embedded computer, a (usually) small computer used to control another device. Machines from fighter planes to digital cameras are controlled by embedded computers.

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Church-Turing thesis: In computability theory the Church?Turing thesis, Church's thesis, Church's conjecture or Turing's thesis, named after Alonzo Church and Alan Turing, is a hypothesis about the nature of mechanical calculation devices, such as electronic computers....

Universal Turing machine: In computer science, a universal Turing machine is a Turing machine that can simulate an arbitrary Turing machine on arbitrary input. The universal machine essentially achieves this by reading both the description of machine to be simulated as well as the input thereof from its own tape. Alan Turing...

Personal digital assistant: Personal digital assistants (PDAs or palmtops) are handheld devices that were originally designed as personal organizers, but became much more versatile over the years. A basic PDA usually includes a clock, date book, address book, task list, memo pad, and a simple calculator. One major advantage of...

Computer related Images and Photos (experimental)

Gunnar Computer Glasses	Batman Computer Sitter Bobble Head	The Computer Wore Tennis Shoes 1970	Computer Generated Image of Person's Face
Spider-Man Computer Sitter Bobble Head	Wonder Woman Computer Sitter Bobble Head	c-Jump Computer Programming Board Game	Star Wars Yoda Computer Sitter Bobble Head
Omgpwnies Red Ladies Computer Bag	Kids Getting a Computer Lesson	Star Wars Boba Fett Computer Sitter Bobble Head	Star Wars Darth Vader Computer Sitter Bobble Head