Full transcript
0:00welcome to learn computer
0:01scienceonline.com and in this video we
0:05are going to discuss what is an
0:07operating system its functions types and
0:10its importance in computer architecture
0:13and organization
0:14let us start with a simple brief
0:16introduction to the operating system
0:19an operating system is a group of
0:21software specially designed to help the
0:24user to manage and operate the computer
0:26system
0:27in other words the operating system is a
0:30type of system software that works as an
0:33interface between the system user and
0:35the computer hardware
0:37the operating system is an essential
0:39component of every computer system
0:42it is a type of system software used by
0:44the computer system itself to manage and
0:47operate the system
0:48it also helps the computer user to
0:51interact with various Hardware
0:53components that are either connected or
0:55part of the computer system
0:57an operating system performs some of the
1:00most important functions that are
1:02crucial for the operation performance
1:04and the safety of the computer system
1:07the resource management is one such
1:09important function performed by the
1:11operating system all right after this
1:14brief introduction let us now dive a bit
1:17deeper to understand what is an
1:19operating system and its importance in
1:21computer architecture and organization
1:24let us now discuss in detail what is an
1:27operating system in computer
1:29architecture the computer system
1:31basically consists of two types of
1:34components
1:35these components are first the hardware
1:38components and second the software
1:40components the computer hardware is a
1:43general term used to describe the
1:45various physical components that are
1:48essential part of the every computer
1:49system
1:50the computer hardware includes various
1:53mechanical electrical and electronics
1:57components used to build a computer
1:59system whereas the software components
2:02provide a set of instructions which
2:05directs the computer to perform a
2:07specific task
2:08in other words a software is a computer
2:11program used to communicate with
2:13computer regarding the operation that we
2:16want computer to perform
2:18the computer system needs basically two
2:21types of software components the first
2:23type of software is called an
2:25application software and the second type
2:28of software is called a system software
2:30an application software is designed to
2:33allow the computer user to perform
2:35various tasks on the computer
2:38for example Microsoft Word is the most
2:41commonly used application software for
2:43creating the text documents
2:46whereas the system software is a special
2:49type of software internally used by the
2:51computer system itself to manage and
2:54operate the computer system an operating
2:57system is the most important system
2:59software and it is an essential
3:01component of every computer
3:03when we power on and start the computer
3:05it is the operating system that gets
3:08loaded into the main memory RAM of the
3:10computer
3:11this startup operation which loads the
3:14operating system into the memory is
3:16called as computer booting process
3:19the computer user can operate the
3:21computer system only after the operating
3:23system software is fully loaded into the
3:26computer memory and it is fully
3:28operational
3:29once the operating system is fully
3:32operational the computer can be used by
3:34the user to perform various tasks on the
3:37computer
3:38the computer system booting process is
3:40managed by a special program called the
3:43bio startup routine
3:44the term BIOS stands for basic input
3:47output system the BIOS program is a type
3:50of firmware that resides into the BIOS
3:53chip placed on the computer motherboard
3:55the main function of the BIOS software
3:58is to load the operating system
4:00and therefore the BIOS comes into action
4:03each time we switch on the computer
4:06the operating system gets the control of
4:08the system after the booting process is
4:10complete let now briefly discuss some
4:14important functions performed by the
4:16operating system as discussed earlier
4:18the operating system performs several
4:21important functions
4:23the operating system functions include
4:25file management Process Management
4:28Resource Management memory management
4:31command interpreter and the system
4:34security let us now discuss some
4:37important features of the operating
4:38system
4:39the hardware interaction is the most
4:42important feature of the operating
4:43system
4:44let us discuss this topic in detail in
4:47computer architecture the operating
4:49system works as an interface between the
4:52application software and the computer
4:54hardware the application software is
4:57designed to allow the computer user to
5:00perform various operations on the
5:02computer
5:03these operations might also include some
5:06Hardware interaction for example a
5:09computer user might use the Microsoft
5:11Word program to create a text document
5:14in some cases the user might also want
5:17to use the printer connected to the
5:19system for taking the print out of the
5:21document
5:22however the application program used by
5:24the user cannot directly communicate
5:27with the computer hardware
5:29and therefore in order to communicate
5:31with Hardware the application program
5:33needs operating system to communicate
5:36with the hardware device
5:38the operating system internally makes
5:40use of another piece of system software
5:43called the device driver
5:45it is the device driver software that
5:47internally communicates with various
5:49Hardware components to execute various
5:52operations to be performed by the
5:54hardware
5:55for example when user executes the print
5:58command through an application software
6:00the operating system internally used the
6:03printer device driver to execute the
6:06print command
6:07let us now discuss different types of
6:09operating systems different types of
6:11operating systems are used depending
6:14upon the user requirements type of the
6:16Computing device and the system
6:18configuration
6:19some important types of operating system
6:21include a single user and the multi-user
6:25operating system batch operating system
6:27time sharing operating system
6:29distributed operating system Network
6:32operating system embedded operating
6:34system real-time operating system and a
6:38mobile device operating system
6:40all right let us now summarize what is
6:43an operating system the operating system
6:45is a type of system software and
6:48essential component of every computer
6:50system
6:51it internally consists of group of
6:54programs specially designed to help the
6:57user to operate and manage the computer
6:59system
7:00that brings to the end of this tutorial
7:02on what is an operating system
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