Chapter 2

In the end of the lesson, student should be able to..  Describe the main components of a computer system, hardware.  Provide examples of hardware device that handle input, output, motherboard and storage task.  differentiate type of input device and output device.

1) Introduction of computer  What is computer? A programmable machine. The two principal of characteristic of a computer are: 1)It responds to a specific set of instructions in a well-defined manner.instructions 2)It can execute a prerecorded list of instructions (a program).executeprogram  Evolution of computer (

Type of computer  Computers can be generally classified by size and power as follows, though there is considerable overlap: 1) personal computerpersonal computer 2) minicomputerminicomputer 3) mainframemainframe 4) supercomputersupercomputer

Computer system Collection of related component that have been designed to work together. Their perform four basic operations: input, output, processing and storage.

Overview of computer system InputOutput Process Storage

 What is input? Any data or instructions you enter into the memory of the computer Users can input data and instructions in a variety of ways. Example (keyboard,mouse etc) Input

Overview of computer system InputOutput Process Storage

 The execution of arithmetic or comparison operation on data.  The devices is motherboard: A large circuit board containing the computer central processing unit, support chips, random access memory, and expansion slots. Also called a main board. Process

A “motherboard” Expansion slots Pins to attach to motherboard A RAM chip

Overview of computer system InputOutput Process Storage

 The result of processing information that enable people to see, hear, and even feel that result.  Example of device is:  1.monitor  2.printer  3.speaker/earphone Output

Overview of computer system InputOutput Process Storage

 Storage that the computer saves the result of processing to used again later.  Storage devices hold all of the program and data that the computer uses.  Example of devices is: a hard disk, a floppy disk, CD ROM or DVD ROM. Storage

Activities

Activities.. Group 1. Present about the computer system. Group 2.Present the differences of input devices and output devices.