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An OS system performs these services for application


1) In a multitasking operating system where multiple programs can be running
at a same time each application before giving another apllication turn

2) It manages the sharing of internal memory among multiple application

3) It send messages the sharing of internal memory among multiple application

4) It can offload message to each application user about status the of operation
and any errors that may have occurred

common desktop operating system:

Windows is Microsoft flagship OS the DE fact standard for home
and business computer in 1985, the GUI-based OS has
been released in many versions

Mac OS is the operating system for apple Macintosh line of personal
computers and workstations.

Linux is Unix-like OS that was designed to provide personal
computer users a free or very low cost.
Linux has a reputation as very efficient and fast-performing system.

Windows OS have long dominated the market and continue to do so.
as of AUG.2016, windows system had
a market share of over 85 percent

A mobile OS allows smartphone, tablet PC and other mobile devices to run
application and programs.

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