Basics of computer architecture.

Question 1. what is computer?

Computer is an electronic machine that can be programmed to carry out set of  "arithmetic (such as addition, multiplication, division etc.)" and "logical (such as less than, more than, and equal to etc.)" operations. The computer can solve more than one kind of problems.

Desktop Computer.

It is an electronic device that take data from the outside world thorough the input (such as keyboard, mouse, and microphone etc.) unit with the help of a user then process it under the control of set of instructions and gives the results through the output (such as speaker, printer, and display etc.) unit for a user.

you can use it to type document, send E-mail, and browse the "Internet".

All types of computer consist of two parts "Hardware" and "Software".

The term hardware includes the physical parts of the computer that we can touch and see with naked eyes such as keyboard, mouse, printer, speakers etc. And these are touchable parts of the computer.

But the software is not touchable that don't include the physical parts of the computer. It refers to the instructions, or programs that tells the hardware what to do. Some examples of software are web browsers, games and word processors such as Microsoft word.