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Operating systems
Juan Antonio Martínez
Morones
 An operating system (OS) is a collection of
software that manages computer
hardware resources and provides
common services for computer programs.
Characteristics
 The operating system is an essential
component of the system software in a
computer system.
 Application programs usually require an
operating system to function.
 Time-sharing operating systems schedule
tasks for efficient use of the system and
may also include accounting software for
cost allocation of processor time, mass
storage, printing, and other resources.
Examples of popular
modern operating systems
 Android, BSD, iOS, GNU/Linux, OS X,
QNX, Microsoft Windows, Windows
Phone, and IBM z/OS.
Types of operating systems
Real time
 A real-time operating system is a
multitasking operating system that aims at
executing real-time applications. Real-
time operating systems often use
specialized scheduling algorithms so that
they can achieve a deterministic nature
of behavior.
Multi user
 A multi-user operating system allows
multiple users to access a computer
system at the same time. Time-sharing
systems and Internet servers can be
classified as multi-user systems as they
enable multiple-user access to a
computer through the sharing of time.
Distributed
 A distributed operating system manages
a group of independent computers and
makes them appear to be a single
computer. The development of
networked computers that could be
linked and communicate with each other
gave rise to distributed computing.
Embedded
 Embedded operating systems are
designed to be used in embedded
computer systems. They are designed to
operate on small machines like PDAs with
less autonomy. They are able to operate
with a limited number of resources.

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Operating systems

  • 1. Operating systems Juan Antonio Martínez Morones
  • 2.  An operating system (OS) is a collection of software that manages computer hardware resources and provides common services for computer programs.
  • 3. Characteristics  The operating system is an essential component of the system software in a computer system.  Application programs usually require an operating system to function.
  • 4.  Time-sharing operating systems schedule tasks for efficient use of the system and may also include accounting software for cost allocation of processor time, mass storage, printing, and other resources.
  • 5. Examples of popular modern operating systems  Android, BSD, iOS, GNU/Linux, OS X, QNX, Microsoft Windows, Windows Phone, and IBM z/OS.
  • 7. Real time  A real-time operating system is a multitasking operating system that aims at executing real-time applications. Real- time operating systems often use specialized scheduling algorithms so that they can achieve a deterministic nature of behavior.
  • 8. Multi user  A multi-user operating system allows multiple users to access a computer system at the same time. Time-sharing systems and Internet servers can be classified as multi-user systems as they enable multiple-user access to a computer through the sharing of time.
  • 9. Distributed  A distributed operating system manages a group of independent computers and makes them appear to be a single computer. The development of networked computers that could be linked and communicate with each other gave rise to distributed computing.
  • 10. Embedded  Embedded operating systems are designed to be used in embedded computer systems. They are designed to operate on small machines like PDAs with less autonomy. They are able to operate with a limited number of resources.