A computer is a programmable machine that receives input, stores and manipulates data, and
provides output in a useful format to the user.
However, Computer is originated from word COMPUTE which means calculate. However, people generally breakdown term computer and tell Full form for Computer is:
C: Commonly
O: Operate
M: Machine
P: Particularly
U: Useful for
T: Trade/Training
E: Education
R: Research
Characteristics of Computer
- The ability to perform calculations at the very fast speed. >> Speed and Timeliness
- The ability to take information and to store that information for future retrieval. >> Versatile
- The ability to take in and store a small variety of instructions for execution. >>Reliability
- The ability to use simple logical rules to make decisions for their own internal controls or for the
- Control some external activities done by computer. >> No IQ
- The ability to communicate with other computer systems. >> Sharing
- To carry out computations and analysis accurately and speedily. >>Accuracy
Functions of a Computer
Inputting: refers to the process of entering data into the computer by the user using an input device.
Storing: Refers to the holding of data and instructions in the computers main memory for future
Manipulations.
Processing: Refers to performing operations both arithmetic and logical manipulation of data
entered into computer so that useful information may be taken out of the entered data.
Outputting: Refers to the process of showing the information or result to the user either on screen
or on Papers through the printer.
Controlling: Refers to directing all the above process in co-ordination. This controlling is done by the
Control unit.
