Operating Systems
Operating system are made up of that is allow s users to interact with the computer system. Operating system have a number of key functions:
- loading, running and storing application programs
- handling errors that occur in application programs
- Maintaining the security of the computer system
User interface
A user interface allow the user of the computer to interact and play with the computer system. There are two main types of user interfaces:
- Command line interface-CLI
- Graphical user interface-GUI
Command line interface
CLIs are usually seen in special systems, where the users have to learn and remember commands that have to be typed in for even the simplest of actions. In window 7&8 you can access the CLI by the command prompt (CMD) apps.
The advantage of CLIs are that the user communicates directly with the computer and make decisions about exactly they wanted to happen.
The disadvantage of CLIs are that typing in command can be slowed and can be frustrated.
Graphic User Interfaces
GUIs use picture and symbols rather than commands or typing code in. All commands that would have been typed in CLI are already program into the GUI.
IGCSE ICT 