SKILL AREA 300: REVIEW COMPUTER SYSTEMS. 300 - 1: DIFFERENT TYPES O F COMPUTER. WHAT IS A COMPUTER?. an electronic device that manipulates information, or "data.“. has the ability to store , retrieve , and process data; .
REVIEW COMPUTER SYSTEMS
300 - 1:
an electronic device that manipulates information, or "data.“
has the ability to store, retrieve, and process data;
COMPUTER SYSTEM THEN?
It is a system of interconnected computers that share a central storage system and various peripheral devices such as a printers, scanners, or routers.
Each computer connected to the system can operate independently, but has the ability to communicate with other external devices and computers.
By principles of operation
Analog computers work on the principle of measuring; - measurements obtained are translated into data.
Modern analog computers usually employ electrical parameters, such as voltages, resistances or currents, to represent the quantities being manipulated.
Such computers do not deal directly with the numbers. They measure continuous physical magnitudes.
- Digital computers operate with information, numerical or otherwise, represented in a digital form.
- They give the results with more accuracy and at a faster rate.
- For computational purposes, hybrid computers use analog components and for storage, digital memories are used.
- Hybrid computers incorporate the measuring feature of an analog computer and counting feature of a digital computer.
Used for highly calculation intensive tasks and problems requiring complex calculations such as weather forecasting, climate research, molecular modeling, aircraft and spacecraft designing, etc.
Fastest and most powerful computers – generally operate 4 to 10 times faster than mainframe computers
At the frontline of current processing capacity, particularly speed of calculation
Designed to work on a single problem at a time
The chief difference between a supercomputer and a mainframe is that a supercomputer channels all its power into executing a few programs as fast as possible, whereas a mainframe uses its power to execute many programs concurrently.
In some ways, mainframes are more powerful than supercomputers because they support more simultaneous programs. But supercomputers can execute a single program faster than a mainframe.
Very large and powerful computers – enormous input, process, output and storage capacities
Generally used in centralized databases.
Mainframe computers are able to host multiple operating systems and can handle hundreds of users simultaneously
In general, a minicomputer is a multiprocessing system capable of supporting from 4 to about 200 users simultaneously.
Midsized computers whose size, speed and capabilities lie somewhere between mainframe and microcomputer.
They are used for
real-time applications in industries, research centers, etc.
The users can access the minicomputer through their PCs or terminal.
A microcomputer contains a central processing unit (CPU) on a microchip (the microprocessor), a memory system , a bus system and I/O ports, typically housed in a motherboard.
a complete computer on a smaller scale also known as personal computer or PC
a computer designed for an individual
It is simply a desktop computer that has a more powerful processor, additional memory and enhanced capabilities for performing a special group of task, such as 3D Graphics or game development.