viernes, 3 de mayo de 2013

Embedded Systems

Some computers are designed to work in just one particular situation.

computer systems

Asystem is a collection of parts that work togheter for a particular pupose, for example, the human digestive system. Weuse system in everyday life, such as transport and banking systems.

mainframe computers

what is a mainframe ?

movile phones

Movile phone are the most commonly used computers in the world.they have a processor and memory and can run programs.

WAP stands for Wireless Access Protocol.This is a set of standards that allows PDAs and and movile phones to access the internet.
Some computers have become more like movile phones, whilist some movile phones have become more like general purpose computers. Asmart phone is a device that´s mainly concerned with phone functions but also has emails, internet and other features.
history of the movile phone

miércoles, 24 de abril de 2013

PDAs

It is a small, hand-held computer that can be used as:
  • as a PC
  • for web browsing
  • as a movile phone
  • as a portable media player       
Some PDAs have a touch screen and are controlled using a stylus

laptops

Many people work on the move these days and use portable computers. some laptops are small and light, while others, have large screens that are useful for work or watching films.

NETBOOKS have built in wifi access, webcams, speakers, and microphones. they are small and light. they save wight by not having a cd drive. However, netbooks can be fiddly to use because of their small keys and screens.

The latest portable computers have enough battery life to allow someone to work most of the day on one charge.

viernes, 12 de abril de 2013

Personal Computers (PCs)

Most people are familiar with general. These computers can run a wide variety of programs, whic make them to different things, for example, word processing or creating electricity bills.
the PC ( personal computer ) is a general purpose computer. It comes in various forms, e.g. a desktop PC, a laptop, a PDA or even a movile phone.

You can have more information on :  http://en.wikipedia.org/wiki/Personal_computer

what is a computer ?

a computer is an electronic machine that processes data. It follows instructions given to it in the form of a program.
Computers are everywhere these days and there are many different types.