Operating system. Functions and components of OS. Types of OS. Process and a program. Obejctives
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. What is an Operating System (OS)
Functions of OS Providing a user interface Running applications Support for built in utility programs. Control to the computer hardware
Components of OS Process Management Memory management I/O Device management Network management Network services User Interface
Single user, Single Task Single user, Multi-tasking Multi user, Multi-tasking. Types of OS
Command line interface Graphical user interface Operating System interface
Single user multi-tasking os allows user to perform one or more than one task at same time Commonly os are MS windows Apples macintosh Single User Multi-tasking Single User Multi-tasking
Microsoft Windows: Windows is a series of operating systems developed by Microsoft. Each version of Windows includes a graphical user interface, with a desktop that allows users to view files and folders in windows. For the past two decades, Windows has been the most widely used operating system for personal computers PCs. Single user Multi tasking Example
MacOS X: OS X is version 10 of the Apple Macintosh operating system. OS X was described by Apple as its first “complete revision” of the OS since the previous version is OS 9, with a focus on modularity so that future changes would be easier to incorporate. Written in c++ .c .objective -c Macintosh
This type of operating system only has to deal with one person at a time, running one user application at a time.\ An example of a this kind of operating system would be found on a mobile phone. There can only be one user using the mobile and that person is only using one of its applications at a time. Single user Single tasking
Reliable. Operational at all times. Should coordinate and have good control of input and output operations and the devices on which they are performed. Features of Operating System
Computers Mobile phones 3d televisions Video game ATM Examples of computing devices which use OS
Easy to use User friendly Intermediate between all hardware's and software's of the system No need to know any technical languages Its the platform of all programs Advantages of OS
If any problems affected in OS, you may lose all the contents which have been stored already Unwanted user can use your own system Disadvantages