Lesson 24: Overview of computer system

Keywords:
Computer System is defined as combination of several units or component to process information.
There are INPUT, OUTPUT, PROCESS & STORAGE as the main components in computer system.

In order for this system to function it must involved hardware, software and users.
The computer process is involved ; Fetching-Decoding-Execute-Store.
Bit is the smallest data representation which has only TWO conditions 1

JUST THE FACTS

• Computers work by running programs or software. Programs are normally stored on your hard disk and loaded into memory to be executed by the CPU.
• You control the operating system through its user interface. A GUI or graphical user interface uses the manipulation of visual components, while a command line interface requires you to type in specific commands.
• Your computer has two kinds of software: systems software (aka the operating system), which is loaded when your computer starts up, and applications which are programs you use to accompish a particular task.
• Computer programmers create programs by writing source code in a programming language. This source code must be converted to a native machine language that the CPU can execute.
• Your CPU consists of two parts—the Control Unit and the Arithmetic Logic Unit (ALU)— that work together to perform the steps of the machine cycle: fetch, decode, execute, and store.
• Just like numbers, pixels and sounds, your computer stores computer programs as binary numbers. In the end, "bits is bits".

My lesson:
Date: 5 Apr 2013  Class: 4A
Methods: Lecture, discussion & simple task
Materials: Power point notes
Rating : Good! Student can explain the process "A is pressed and displayed on screen"