Kathy+Coombes

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Originally computers were made for one person to work on a computer however someone decided to make two computers connect to each other and so networks were made. A computer not connected to a network is called a stand-alone, in offices or schools computers are joined togther to make a network when a computer s connected to a network it is called a work-station. LAN are local area networks which are acessible to computers near each other they require a password and username. WAN are Wide are networks which are more for companies which need to connect to each from different countries - such as the internet. ====== A bus is the simplist form of a network where the computers are all connected by just one wire - they are easy to set up but if the there is a problem with the central cable then the whole network wont work. A ring is where the computers are connected in a circle it is simple to add more computers but if one computer is turned off the whole system will close. A star netwrok is when is computer is connected by its own wire to the hub. They are very reliable but are expensive and hard to set up.

__Types of computer__ there are many different types of computers. Super computers are the fastest and most expensive in the world. The can cost hundreds of millions pounds. They are mainly used by huge pharamacy companies or the milirty. The are so hot they have toi be build in a special room with heat contrals and airconditioning. The wires that connect the computer may be many miles long. Mainframes are very large computers but are not as fast as a supercomputer but cost a lot less around 4 million. They are used by large compaines such as airlines or the police. Personal computers (PC) or (desktop personal computers). A keyboard and mouse are used to input the data and the monitor is used to output the data. They used to be all the sae but now many designs have been made. They are useful for lots of different types of tasks:
 * Running office applications such as word processors, spreadsheets and databases
 * For CAD design such as designing kitchens
 * Editing videos
 * Creating and playing music
 * Accessing the Internet for research, work and entertainment