Since all the operations of a computer are caused by electrical pulses and since electricity travels at the speed of light. Computers too can perform innumerable operations in just one second . The processing speed of a computer is generally measured in nanoseconds one nanosecond, which is equal to one billionth of a second. By the time an average person takes to read the contents of this page the earliest model of the IBM microcomputer will add together a million numbers and still have time to spare. You can imagine what would be the speed of the latest models of computers running 100 times faster. Computers have very large storage capacity. the contents of around two hundred sheets of A4size paper can be stored on a email disk which is not even half storage cabinets can be stored in a device. Famous references works like the encyclopedia Britannica and oxford dictionary of English occupy many large shelves in libraries but today they are stored in a optical disks that we are less in itself and weight compared to an LP record. While this in itself is impressive , computers also provide very quick and easy access to all the data . typically a word can be located in an electronic dictionary of more that 100,000 words in under a minute.
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