What do Computer do? Data and Information

What do Computer do?

Input, Process, Output and Store data

Data and Information

All Computer processing requires data, which is a collection of raw facts, figures and symbols, such as numbers, words, images, video and sound given to the computer during the input phase.
Computers manipulate data to create information. Information is data that is organized, meaningful and useful.

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Memory Unit and types of memory

Memory Unit Found on the motherboard Short Term Random Access Memory (RAM) Long Term Read Only Memory (ROM) Random Access Memory (RAM) RAM is a read/write memory. Information can be written into and read from a RAM. It is a volatile memory. It retains the stored information as long as it is supplied with power supply is switched off or interrupted, the stored information in the RAM is lost. RAMs of various capacities are available for example, 256MB, 512MB and so on. Read Only Memory (ROM) Rom is a permanent type memory. Its content are not lost when power supply is switched off. The user cannot write into a ROM. Its contents are written into at manufacturing time. ROMs store permanent programs and other types of data which are needed by the computer to execute user program. Types Of ROM PROM (Programmable ROM) EPROM (Erasable PROM) EEPROM (Electronically Erasable PROM) Cache Memory The data or contents of the main memory that are used frequently by CPU are stored in the cache memory

What is a Computer?

What is a Computer? Computer stands for " Commonly Operated Machine Particularly Used For Trade Education and Research" . It is a very versatile electronic machine man has ever created. Computers have made a great impact on everyday life. Their presence is felt in almost everyway of life be IT home, School, College, Office, Industry, Hospital, Bank, Retail stores, Railways, Research and Design Organizations etc.

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