This differs from system to system, for example Microsoft windows runs gui in kernel mode, which means that it's integrated, while gnu/Linux runs a X server, to which user connects creating a session.
End effect is the same - a graphical interface for communicating with system and using it's services and programs.
User Interface
An operating system is a main program that serve as an interface between the users and the application programs.
A user interface (UI) is the part of an operating system, program or device that the user uses to input and receive data
User Interface
user interface
POSIX stands for Portable Operating System Interface..
operating system
Apple is responsible for developing the Mac operating System.
The system call interface defines all the services of the operating system to the programs. The basis of the different variants of the UNIX operating system is different system call interface. SVID (System V interface definitions ) POSIX standard (IEEE) POSIX 1003.4 is API (Application Program Interface) for the real time systems. www.etherlook.com
It is a set of commands or actions that an operating system can perform and a way for a program or person to activate them.
The 'shell' is a user interface program that interfaces between a user of the system and the Operating System. It is the user interface.
The 'shell' is a user interface program that interfaces between a user of the system and the Operating System. It is the user interface.