Computer, what is it ?

According to language, computer based from Computare that have means is calculate.

In Modern meaning computer is a machine that can do the data manipulation according to a list of instruction. To do that, computer need something helps that we call programs.

From other People computer maybe have different meaning, its depend on their needed with the computer.

From some expert writer in computer, they have means :
1. Robert H B ( Computer Annual )
Computer is an electronic that can do some work :
- Receive input
- Input processing according to their program
- Saving commands and result of from processing
- Providing output in information form

2. Donald H Sanders ( Computer Today )
Computer is electronic system that quickly and precisely for data manipulation.

3. V. Carl Hamacher, Zvonko G. Vranesic, Safwat G. Zaky ( Computer Organization )
Computer is a quickly electronically calculating machine, can input digital information, processing according to their program that their saving.

4. William M Fuori ( Introduction to the computer : The tools of business )
Computer is a data processor that can do big calculation and quickly, including arithmetic or logical operation, without human intervene ( in processing result )