OVERVIEW OF COMPUTER STUDIES

WHAT IS COMPUTER?
Computer is an electronic device that accepts data inform of text, number picture and sound through input devices, processes the data through processing device and produces result also known as information in a specified format through the help of installed program at a very fast speed.
PARTS OF COMPUTER
Parts of computer are mainly divided into two:
(A)  Hardwares: These are parts of computer that we can see, touch and carried about. Examples are:
(i)      PC case
(ii)    Hard Disk Drive (HDD)
(iii)  Motherboard or System board or Main board
(iv)  Mouse
(v)    Keyboard
(vi)  Monitor
(vii)  Speaker
 (viii) Floppy Disk Drive (FDD)
(ix) Compact Disk Drive (CDD)
(x) Cables and wire etc.
             (B) Softwares: These are programs that enables computer to perform a specific task.
      Examples are:
(i)      Internet browser
(ii)    Ms – Word
(iii)  Ms – Excel
(iv)  Corel Draw
(v)    Page maker
(vi)  Video Editor
(vii)            Ms – Access
(viii)          Adobe reader
(ix)  Window XP
(x)    Window 7 etc.
CHARACTERISTICS OF COMPUTER
(i)      It processes data at a very fast speed.
(ii)    It is very accurate.
(iii)  It has large storage facilities.
(iv)  It performs many different types of tasks.
(v)    It can perform many jobs without need of human help once a command is given.

(vi)  It does not get tired or bored.

USES OF COMPUTER
(i)                 It is used for typing document.
(ii)               It is used for entertainment; playing of computer games and watching movies etc.
(iii)             It helps us in refining our general knowledge through animation and multi media.
(iv)             You can send electronic mail and also browse the internet through computer.
(v)               Daily schedule can be input into a computer.
APPLLICATIONS OF COMPUTER
(i)                 Education.
(ii)               Industries.
(iii)              Banking sector.
(iv)              Hospitals.
(v)               Transportation.
(vi)             Insurance.
(vii) Science and Engineering.
(viii) Business (Preparing payrolls).
(ix) Telecommunication.
(i)                 Entertainment.
(xi) Railways and airlines.
(xii) Desktop Publishing.

LIMITATIONS OF A COMPUTER
(i)                 Computer can store vast amount of data in their memories but only human can tell
       them what to do with that data.
(ii)               It can’t implement the decision that they suggest.
(iii)             It cannot do anything unless they are first programmed to perform a specific task. 

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