It is to make data processing more organized. Not only that, it always speeds up work that can be done and can eliminates a lot of steps in a normal process. It can save you money and make you money as well.
user interface
The Administrator has access to system settings on a computer that a Registered user doesn't. The Administrator has full control over a computer system and can limit the amount of control a registered user has.
computer system
A "single user" refers to a single computer or system using the operating system. Meaning only one computer will/can have it installed.
Most operating systems native to the computer system allows users to communicate with the computer system
A computer system for one user may be just one element, a computer, and related peripheral elements, devices.
It is called the user interface.
In single user there will no confusion in computer system .It is easy to use .The posibility of damaging the system is less .In single user only one user can use the system at one time
an operating system is the intermediate between computer applications and user.
interface
An operating system is a software which enable the user to interact with the computer.
actually operating system intermediary between user of the computer and hardware of the computer that's why operating system was created to provide proper functioning of computer hardware and to satisfy user requirements in this multi-programming environment .