types and components of computer system
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Components of computer System Hardware and software Main components of computer
system Operating system Control devices
Hardware• The physical parts that make up a computer • Examples: Monitor, Mouse, Keyboard, Speaker,
Microphone, Printer, Web cam, Scanner
Software$ Genreally mean: “ set of instructions that operates the
computer”$ Application software: “ programs that enable a user to do
specific task”. Example: Word processor, Spreadsheet, Database, Presentation, Web browser, Desktop Publisher, Graphics Program$ System software: “programs that enable hardware to run
properly” Example: GUI and CLI
Main components of computer system
£ A typical computer is made up of hardware and software1. Input devices: keyboard, mouse2. Output devices: speaker, monitor3. Secondary storage device: magnetic tapes, optical disk4. Processor and internal memory devices:
∞ CPU is a one or more circuit board which is made up of discrete components which interprets and execute commands from hardware to software.
∞ Internal hard drive is the main memory which stores the software and data files. Fast data transfer and large memory capacity.
∞ Random Access Memory(RAM) is an internal chip where data of running application is stored temporarily. This memory can be written and read from.
∞ Read Only Memory(ROM) is used to store permanent memory(NON-VOLATILE). Can only be read but not written. Contains some coding known as boot file [ Basic input/ output system(BIOS)]
Main component
s of computer system
Output devices
Input devices
Processor and
internal memory devices
Secondary storage device
Key-board
mouse
monitorspeake
r
Magnetic
tape
Optical disk
CPU
Internal
hard drive
Random
Access Memory(RAM)
Read Only
Memory(ROM)
more circuit board
Operating system€ To enable users to communicate with computer systems.
♫ Controlling the operation of input, output and backing storage device
♫ Supervising the loading, running & storage.♫ Dealing with errors♫ Maintaining security of program♫ Maintaining a computer log♫ User interface (allowing communication between user and
computer)€ Command Line Interface(CLI)
λ Require to type in instructions in order to choose optionsλ Must learn commands and slow to have to key in commandsλ Direct communication with computer and not restricted to a
number of pre-determined option.
€ Graphical User Interface(GUI)ћ Using icons(pictures/symbols) to represent
applications.ћ Windows icons menu and pointing device/ WIMPћ Uses cursor to select icons