A computer is a machine for manipulating data according to a list of instructions known as a program.

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 is in principle capable of performing the tasks of any other computer, from those of a personal digital assistant to a supercomputer, as long as time and memory capacity are not considerations. Therefore, the same computer designs may be adapted for tasks ranging from processing company payrolls to controlling unmanned spaceflights. Due to technological advancement, modern electronic computers are exponentially more capable than those of preceding generations (a phenomenon partially described by Moore's Law).

Computers take numerous physical forms. Early electronic computers were the size of a large room, and such enormous computing facilities still exist for specialized scientific computation — supercomputers — and for the transaction processing requirements of large companies, generally called mainframes. Smaller computers for individual use, called personal computers, and their portable equivalent, the laptop computer, are ubiquitous information-processing and communication tools and are perhaps what most non-experts think of as "a computer". However, the most common form of computer in use today is the embedded computer, small computers used to control another device. Embedded computers control machines from fighter aircraft to digital cameras.

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RT @JayOatway: RT @gadgetlab Why not use what you sell? Apple Stores will use iPod Touch as checkout computers http://bit.ly/1fzFZV
theresepmiller (Therese P. Miller) Wed, 04 Nov 2009 16:49:43 -0000
RT @JayOatway: RT @gadgetlab Why not use what you sell? Apple Stores will use iPod Touch as checkout computers http://bit.ly/1fzFZV
@AmSci hmm, not as exotic as I imagined. I was getting all pre-NES there. When computers were computers and nerds were nerds.
joel_birch (joel_birch) Wed, 04 Nov 2009 16:42:19 -0000
@AmSci hmm, not as exotic as I imagined. I was getting all pre-NES there. When computers were computers and nerds were nerds.
in computers!!!
brittlynnnelson (Brittany Nelson) Wed, 04 Nov 2009 16:38:48 -0000
in computers!!!
@xicegrillz It's makeup. People always think I'm talking about computers or something & I know you're not drunk. It's too early for that.
OhHaiAshlei (Ashlei) Wed, 04 Nov 2009 16:32:45 -0000
@xicegrillz It's makeup. People always think I'm talking about computers or something & I know you're not drunk. It's too early for that.
What do I love about networking all the house computers together? Getting to control 'em all! heheh. Restarted partners system! lol
cybermalemk (Jordan Knight) Wed, 04 Nov 2009 16:29:19 -0000
What do I love about networking all the house computers together? Getting to control 'em all! heheh. Restarted partners system! lol
So not impressed with computers today. That means Windowses AND Macs.
Minky_Delaney (Sophie Gray) Wed, 04 Nov 2009 16:04:03 -0000
So not impressed with computers today. That means Windowses AND Macs.

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