Earlier computers were sized as large as a room, and several processors worked together to carry out the instruction; consequently they were difficult to operate, or run, and were difficult to repaired but with the advancement of technology, man has developed computers that are not only small in size rather they done the task within the blinking of your eye. With various brands and genres of computers available in the market, it has necessitated users to first plan about their specifications and then to select the system to meet the needs of them.

The genres of computer are:

A minicomputer is like a personal computer that is operated by a sole person, and is used at schools, homes, businesses, etc; microcomputers are classified into two further classes that are desktop computers and laptops. They have a microprocessor, you can work with worksheets, database, word program, surf internet and play games using a minicomputer; where desktop computers are not portable like laptops or note book, and both vary in their sizes. A Personal Digital Assistant (PDA) or palmtop computer is a handheld computer, with touch sensitivity they communicate with desktop computers via a cable connection or infrared rays. Workstations are powerful with greater power than a typical PC ; within a computerized network, workstation is used as a server computer owing to its powerful mechanism and functionality. These all above mentioned types of computers are classified as one main genre of computers, called microcomputers.

A mainframe computer differs from microcomputers as the mainframe computers are larger and powerful and costs million dollars; with larger setups, they are a favorite and ideal to work with; in a giant network, mainframe computer works as a hub while clients computers are workstations or any other type of microcomputers. Minicomputers behave differently from mainframes and microcomputer, they function in between the former describe types of computers, but are used by multiple users. Supercomputers are designed to connect large numbers of processing units, whereas microprocessors are special purpose computers to run programs.

The famous brands dealing in the manufacturing of computers are listed alphabetically under:

According to estimation, thousands of computers that are running in the US at this present day are soon going to be failed because of their 24/7 hours a week; so if you want to discard your computers then recycling is the safest and convenient option to go for. Recycling the computers mean that you are fulfilling your responsibility of being the citizen of a civilized and cultured country; yet remember this key in your mind that before recycling your computers make it sure that you have shredded all the documents and files saved on to the hard drives of computers as just deletion of confidential data not means that you have successfully done with not required documents, so use the shredders or shredding services to safely destroy the documents.