​Introduction to Machine

• ​Machines are human-made things. We use machines to help us do our tasks quickly, easily and better. Using machines save time and energy.

  
  

​Parts of a computer

​A computer is called a smart machine because it can do many things
Functions:
It can be used to play games. It can work without getting tired
It can be used to write letters and stories. It can perform calculations. It can be used to play music. It can store lots of information

​The common parts of a computer are:

1. System unit
2. Monitor
3. Keyboard
4. Mouse

• ​System Unit System unit is the most important part of a computer. It contains the Central Processing Unit (CPU) which is like the brain of the computer. It makes all parts of computer work together.

• Monitor Monitor looks like a television (TV). It displays texts, pictures and videos from the computer. It also allows the user to interact with the computer. It is also called Visual Display Unit (VDU).

• Keyboard has many small buttons, which are called keys. Keys are used to enter text, numbers and other special characters. It is also used to give instructions to a computer such as shut down a computer, open, close and save a file.

• Mouse A computer mouse looks like a real mouse. The long wire attached looks like the tail. The mouse usually has three buttons. It is used for pointing, selecting, dragging and clicking on the screen.