What is a computer System…….?
“A computer system is the synthesis of hardware and software”. A typical computer system employs a computer that uses programmable devices to store, retrieve, and process data.
A computer is a machine that stores knowledge in its memory, and does automated calculation on that knowledge. Automated calculation means that if the machine is given some input, it will product some output.
The term Computer Hardware refers to all the devices that form the computer or connected to the computer that you can physically touch. Hence, the computer screen, the printer, the mouse, and speakers are computer hardware.
A Computer System
· Von Neumann’s PC Structure
The modern microcomputer has roots going back to USA in the 1940’s. Of the many researchers, the Hungarian-born mathematician, John Von Neumann (1903-57), is worthy of special mention. He developed a very basic model for computers which we are still using today.
John Von Neumann (193-57) progenitor of the modern, electronic PC.
Von Neumann divided a computer’s hardware into 5 primary groups.
· CPU
· Input
· Output
· Working Storage
· Permanent Storage
This divided provided the actual foundation for the modern PC, as von Neumann was the first person to construct a computer which had working storage (what we today call RAM). And the amazing thing is, his model is still completely applicable today. If we apply the Von Neumann model to today’s PC, it looks likes this:
Advantages of Computer System
- Speed
- Accuracy
- Reliability
- Diligence
- Versatility
- Artificial Intelligence
Classifications of Computer
Classifications 1
Computers: Analog (ECG), Digital (PC), Hybrid (Super Com.)
Classifications 2
Mini (Single user), Micro (Multi user, <100), Mainframe (Multi user, <100)
Classifications 3
Special Purpose Computers (ECG), Multipurpose Computer (PC)
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