Computer hardware is composed of the following component : central processsing unit (CPU), input devices, output devices, primary storage, secondary storage, and communication devices. In normal computer terms, all physical computer equipment are considered as "hardware". The example of the computer hardware is
- KEYBOARD
- MOUSE
- MICROPHONE
- SCANNER
- PRINTER
- MONITOR
- SPEAKER and extra
Now i would like to introduce the evolution of the computer system.
(1.) SUPERCOMPUTER
-Supercomputer is the most powerful and the most expensive computer designed for scientific, engineering, and business application. This kind of computer can processes billions to trillions of instructions per second, normally used by agencies of the federal government. The usage includes world-wide weather forecasting, weapon research, stock analsis, automobile designing, special effects for movies and used for applications requiring complex mathematical calculations.
Supercomputer Systems
(2.) Mainframe
-Mainframes (often colloquially referred to as Big Iron) are computers used mainly by large organizations for critical applications, typically bulk data processing such as census, industry and consumer statistics, enterprise resource planning, and financial transaction processing. It was large, fast, powerful computer systems which available large memory. This kind of computer able to process large amount of data at high speed, such as millions of instructions per second and accessing billion of character of data. It able to support many terminals at the same time: suitable for heavy worload such as application airline system, goverment department bank and insurance company. Apart from that, it was widely used as supersevers for large client/ server networks and high-volume Internet Wedsites. Beside it had becoming a popular computing platform for data mining & warehousing and electronic commerce applications.
Mainframe Systems
(3.) Midrange server
-Midrange server are high-end network servers that handle large -scale processing of business applications. It was the medium size computer and not as powerful as mainframes, because it was slower, cheaper and smaller memory than mainframes, it support lesser terminals compare to mainfraime. Normally it was used as stand alone computer by medium-sized workload, such as (Educational Institutes, medium to large size retail business, and State government department). Besides, midrange server often used to manage large internet websites, coporate intranets & extranets, and intergrated, enterprise-wide applications. It also use magnetic tape, hard disks, and diskettes for backing memory.
Midrange Systems
(4) Microcomputer
-Microcomputer usually are called a personal computer or PC. It was a smaller computers with microprocessor/microchip (CPU on one Chip). Besides, it can perform all of its input, processing, output, and storage activities by itself. Commonly, this kind of computer are the networked professional workstations used by business processions and the price are inexpensive.
Microcomputer Systems
