1. COMPONENTS OF COMPUTER
1.1. SOFTWARE
1.1.1. SYSTEM SOFTWARE
1.1.1.1. Program that control or maintain the operations of a computer and its devices
1.1.2. APPLICATION SOFTWARE
1.1.2.1. > Program designed to make users more productive and/or assists them with personal task > Program designed that allow people to perform specific task using a computer such as writing letters
1.2. HARDWARE
1.2.1. EXAMPLE: Desktop, keyboard , mouse
2. OVERVIEW OF COMPUTER SYSTEM
2.1. INPUT
2.1.1. Entering data into memory of computer
2.2. Process
2.2.1. Process of transforming data into information
2.3. Storage
2.3.1. Saving data, programs or output for future use
2.4. Output
2.4.1. Process of conveyiong information to the user
3. INPUT AND OUTPUT DEVICE
3.1. INPUT DEVICE
3.1.1. Any hardware component allows users to enter data and instructions into a computer
3.1.1.1. Example input device
3.1.1.1.1. Keyboard
3.1.1.1.2. Pointing device
3.1.1.1.3. Touch screen
3.1.1.1.4. Scanner
3.2. OUTPUT DEVICE
3.2.1. Any hardware component that conveys information to one or more people
3.2.1.1. Example output device
3.2.1.1.1. Speaker
3.2.1.1.2. Printer
3.2.1.1.3. Display device (monitor)
4. MOTHERBOARD AND PROCESSOR
4.1. MOTHERBOARD
4.1.1. Is the main circuit board of the system unit that holds many component of the system and provide connecter for other peripherals
4.1.1.1. COMPONENT
4.1.1.1.1. Processor slot
4.1.1.1.2. Memory slot
4.1.1.1.3. Adapter card slots
4.2. System unit
4.2.1. A case that contains electronic components of the computer used to process data
4.3. Processor
4.3.1. Interprets and carries out the basic instructions that operate a computer
4.3.1.1. COMPONENT
4.3.1.1.1. Control unit
4.3.1.1.2. Arithmetic logic unit (ALU)
5. INFORMATION CODING SCHEME
5.1. ASCIIi
5.1.1. Use 8 bits to represent a character
5.1.2. can represent 256 characters
5.1.3. primarily use in computer
5.2. EBCDIC
5.2.1. Use 8 bits to represent a character
5.2.2. can represent 256 characters
5.2.3. priniraly used in IBM mainframe and high end server
5.3. Unicode
5.3.1. use 16/23 bits to represent a character
5.3.2. can represents 6500 characters
5.3.3. can write many language such as chinese , jawi , and greek
6. MEMORY
6.1. VOLATILE
6.1.1. when computer is turn off . volatile memory loses its content
6.1.2. memory is temporary
6.2. NON-VOLATILE
6.2.1. read only memory (ROM) refers to memory
6.2.2. the data on most rom chips cannot be modified
7. SYSTEM SOFTWARE
7.1. OPERATING SYSTEM
7.1.1. SERVER OS
7.1.2. STAND ALONE OS
7.1.3. MOBILE OS
7.2. UTILITY PROGRAM
7.2.1. Antivirus
7.2.2. file manager
7.2.3. disk cleanup
7.2.4. anti virus program
7.2.5. backup and restore
7.2.6. spyware remover
7.2.7. compression tool
7.3. APPLICATION OF SOFTWARE
7.3.1. word processing
7.3.2. spreadsheet software
7.3.3. presentation software
7.3.4. database software
7.3.5. web browser