| When the word computer is heard we at once think | | | | board and the mouse. The basic output device is the |
| of the desk top PC left on the desk at home or in | | | | monitor. The central processing unit is the real |
| your office. True that it is the PC we call a computer | | | | computer which does the calculation and execution of |
| but these electronic brains are embedded in many | | | | programs. |
| instruments in day to day use from toy cars to fighter | | | | Software too has two sets. One is the operating |
| jets. | | | | system which makes the connection between the |
| The earliest computers were made in the mid 19th | | | | hardware and the programs. The other programs are |
| century. The were very large sometimes filling a room | | | | the various programs used by the computer they |
| the size your of your bed room. These were improved | | | | could be word processers, spread sheets, |
| and with the advent of digital technology they | | | | programming software and so on. |
| improved vastly and reached the present day state. | | | | Though the above is the basic PC presently it has |
| Basically to complete a computer there are two things | | | | developed into various branches. While basic computer |
| which should work together. They are hard ware and | | | | has evolved into smaller laptops note books and net |
| software. Hardware is the physical instruments you | | | | books the microcomputers are embedded in many |
| can see while software are the programs running | | | | instruments like the toys, games and industrial robots. |
| inside the machine making it to work. In a basic | | | | The computer is keeping on developing and soon we |
| computer there are three parts in the hardware. They | | | | might be able to see a car being driven by one of |
| are the input device the output device and the central | | | | these. Still the PC at home left on your desk is your |
| processing unit. The basic input devices are the key | | | | faithful friend. |