Tuesday, February 17, 2009

Computers




Definitions of Computer

A programmable device that performs mathematical calculations and logical operations, especially one that can process, store and retrieve large

What are the different types of computer system?

Personal computers or microcomputers

Microcomputers are built to be used by one person. In fact when you talk about personal computers or its common acronym PC, you always mean microcomputers. For surfing the web, playing games or music, editing and many other tasks… you ordinarily use personal computers either at school, at home or at business.

Types of mobile computers

If you prefer the laptop you’ll go for the mobile or portable system. Your notebook, a common name of laptop, has the advantage to have all the parts built together.
Your notebook has the same computing power to the desktop machine but it is enough lightweight to be portable. If the mobile machine is relatively more expensive it’s because it costs more to design the small components. Maybe you’ll need greater portability. So a handheld micro computer is your first option. To manage your phone book, diary or taking notes...etc a Personal Digital Assistant (PDA) is useful.you can also use the Palmtop, a tinier laptop than the PDA, to the same purposes and even more. The Palmtop is designed with a small keyboard and a flip-up screen and is more usable to surf the web while you are on the move.
Types of mini computers

Apart the micro computers, you may consider three other types of computers: the minicomputers, the mainframes and the supercomputers.

Be advised that the name minicomputers does not mean it is slowest than your PC. Surely not! If you plan to build a home network the minicomputers can be used as a mid- range server to serve multiple users.

However with the mainframe you are able to build a large network for several hundred clients. You can process millions of transactions daily with the mainframe because of its high capacity. Most of enterprises such as large organizations, insurance businesses, industry, banking … usually use the mainframe for processing and storing enormous amounts of data every day.

The supercomputer is the fastest machine in the history of computer not only for its size but especially for its capacity. You won’t have to use this powerful system unless you are working with nuclear or aerodynamic companies by example.Conclusion Through this brief description you had opportunity to learn a lot about the different generation of computer. Nowadays many electronics devices are working like computers. Your iPod, your cell phone or even your watch has an integrated computer application. In the near future you can’t imagine what you are expected as newer types of computer!

List of Best Computer
Apple Computers
Apple
IBM
Mac
Macintosh
Dell
Sony Vaio
Compaq
Alienware
HP

Server Systems

A server is a computer program that provides services to other computer programs (and their users), in the same or other computer. The physical computer that runs a server program is also often referred to as server.[1]
Services can be supplied centrally by the use of a server; in other cases all the machines on a network have the same status with no dedicated server, and services are supplied
peer-to-peer.




Server Operating System

Some popular operating systems for servers — such as FreeBSD, Solaris, and Linux — are derived from or are similar to UNIX. UNIX was originally a minicomputer operating system, and as servers gradually replaced traditional minicomputers, UNIX was a logical and efficient choice of operating system for the servers. UNIX-based operating systems, many of which are free in both senses, are popular.

Technology


Technology is a broad concept that deals with an animal species' usage and knowledge of tools and crafts, and how it affects an animal species' ability to control and adapt to its environment. Technology is a term with origins in the Greek "technologia", "τεχνολογία" — "techne", "τέχνη" ("craft") and "logia", "λογία" ("saying").[1] However, a strict definition is elusive; "technology" can refer to material objects of use to humanity, such as machines, hardware or utensils, but can also encompass broader themes, including systems, methods of organization, and techniques. The term can either be applied generally or to specific areas: examples include "construction technology", "medical technology", or "state-of-the-art technology".