lecture 3.

                                                    Types of Computers :


Differences and Utilities
Computers range in size and capability. At one end of the scale are supercomputers, very large computers with
thousands of linked microprocessors that perform extremely complex calculations. At the other end are tiny
computers embedded in cars, TVs, stereo systems, calculators, and appliances. These computers are built to
perform a limited number of tasks.
The personal computer, or PC, is designed to be used by one person at a time. This section describes the various
kinds of personal computers: desktops, laptops, handheld computers, and Tablet PCs.
Desktop Computers
Desktop computers are designed for use at a desk or table. They are typically larger and more powerful than
other types of personal computers. Desktop  computers are made up of separate components. The main
component, called the system unit, is usually a rectangular case that sits on or underneath a desk. Other
components, such as the monitor, mouse, and keyboard, connect to the system unit.

                                                          Laptop Computers :


Laptop computers are lightweight mobile PCs with a thin screen. They are often called notebook computers
because of their small size. Laptops can operate on batteries, so you can take them anywhere. Unlike desktops,
laptops combine the CPU, screen, and keyboard in a single case. The screen folds down onto the keyboard when
not in use.

                                                                 Handheld Computers :


Handheld computers, also called personal digital assistants (PDAs), are battery-powered  computers small
enough to carry almost anywhere. Although not as powerful as desktops or laptops, handhelds are useful for
scheduling appointments, storing addresses and phone numbers, and playing games. Some have more advanced
capabilities, such as making telephone calls or accessing the internet. Instead of keyboards, handhelds have
touch screens that you use with your finger or a stylus (a pen-shaped pointing tool).


Exercise 3.


Para melhor fixar aquilo que você aprendeu nesta aula, após a leitura dos textos elabore o seu próprio texto.
.  Sobre o que os textos no início da aula tratam?
.  Nesta aula você viu alguns exemplos de tipos de computadores. Elabore um texto simples em inglês e diga
qual o tipo de computador que você tem ou que conhece.
.  Elabore pequenas frases em inglês descrevendo cada tipo de computador existente.



answers:

- Tratam-se dos computadores, os tipos de computadores existentes, laptops, notebooks, computadores, tablets entre outros.

- I have a black computer brand cce, has three years of use, I know computers bigger than mine such as notebooks, netbooks, tablets, among others.

-  - The standard consists Computer mouse, CPU, stabilizer.
- The Notebook is a portable device that can be taken to any fair place more easily.
-The Tablets can be taken in the bag because they are Small appliances.