What is a
Computer?
1.
Computer
a.
Device capable of performing computations and
making logical decisions
b.
Computers process data under the control of sets
of instructions called computer programs
2.
Hardware
a.
Various devices comprising a computer
b.
Keyboard, screen, mouse, disks, memory, CD-ROM,
and processing units
3.
Software
a.
Programs that run on a computer
Six logical
units in every computer:
1.
Input unit
a.
Obtains information from input devices
(keyboard, mouse)
2.
Output unit
a.
Outputs information (to screen, to printer, to
control other devices)
3.
Memory unit
a.
Rapid access, low capacity, stores input
information
4.
Arithmetic and logic unit (ALU)
a.
Performs arithmetic calculations and logic
decisions
5.
Central processing unit (CPU)
a.
Supervises and coordinates the other sections of
the computer
6.
Secondary storage unit
a.
Cheap, long-term, high-capacity storage
b.
Stores inactive programs
Functional Units of a Computer:
Introduction part is very good.
ReplyDeleteThese are the main basic points of Computer System.