COMPUTER TYPES

                                                Types of Computers

Computers range in size and capability. There are large scale called supercomputers or servers.  These are very large computers with thousands of linked microprocessors that perform extremely complex calculations. There are to be found in large organizations like banks, government offices military installations etc.  

Then there are tiny computers chips 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.

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 portable PCs with a thin screen. They are often called notebook computers because of their small size. Laptops 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. They 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).

Tablet PCs

Tablet PCs combine features of laptops and handhelds. They have a built-in screen that allows you to write notes or draw pictures on the screen.  They usually have a tablet pen which can be used to interact with items on the screen. They can also convert your handwriting into typed text. Some have a keyboard underneath the screen.

The Peripherals

All the parts we have reviewed so far are usually required for the computer to function. Some other parts, not required, can also be connected to the computer to complement it. A peripheral is an object attached to the computer to help it perform some necessary assignments none of the other parts can handle. In most scenarios, no peripheral is required but nowadays, it is unusual for a computer not to have any peripheral at all. The most used peripherals are the printer, a digital camera, a scanner, a projector, an external drive (such as an external CD burner for an old computer or an external hard drive), etc.