AN INTRODUCTION TO OPERATING SYSTEMS
An operating
system (OS) is a collection of software that manages Computer hardware resources and provides common services for computer programs. The operating system is a vital component
of the system software in a
computer system. Application programs usually require an operating system to
function.
For
hardware functions such as input and output and memory allocation, the
operating system acts as an intermediary between programs and the computer
hardware, although the application code is usually executed directly by the
hardware and will frequently make a system call to an OS function or be interrupted by it.
Operating systems can be found on almost any device that contains a computer from cellular phones and video game consoles to supercomputers and web servers.
Examples
of popular modern operating systems include Android, BSD, iOS, Linux,
Mac OS X, Microsoft Windows, Windows Phone, and IBM z/OS. All these, except Windows and z/OS, share roots in UNIX
SAP is OS independent(Windows, AIX,
Linux(Centos, fedora, RHEL,SUSE Linux, ORACLE Linux),AS-400(i Series),Sun
Solaris, HP Unix and Zos
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