With the help of this presentation, You will learn about the OS in a short and sweet manner. This presentation will help you to revise of OS. You will also learn about types of OS in this presenatation.

1. Lecture 3
Operating Systems
By : Narendra Singh Shekhawat
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2. What will we cover
What is operating Systems
• Linux
• Windows
• Apple
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3. What is an Operating System ?
• An Operating System is a program that acts as an
intermediary/interface between a user of a computer
and the computer hardware.
• OS goals:
• Control/execute user/application programs.
• Make the computer system convenient to use.
• Ease the solving of user problems.
• Use the computer hardware in an efficient manner.
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4. In a simple way work of Operating Systems
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6. Boot Loader
• Booting is a process that starts operating systems when the user
turns on a computer system.
• A boot sequence is the initial set of operations that the computer
performs when it is switched on.
• The bootloader typically loads the main operating system for the
computer.
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7. Functions of Operating Systems
• Provide a user interface
• Run programs
• Manage hardware devices
• Organized file storage
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8. Types of Operating Systems
• Single user/Single tasking OS
• One user works on the system
• Performs one task at a time
• MS-DOS and Palm OS
• Take up little space on disk
• Run on inexpensive computers
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9. Types of Operating Systems
• Single user/Multitasking OS
• User performs many tasks at once
• Most common form of OS
• Windows XP and OS X
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10. Types of Operating Systems
• Multi user/Multitasking OS
• Many users connect to one computer
• Each user has a unique session
• UNIX, Linux, and VMS
• Maintenance can be easy
• Requires a powerful computer
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11. UNIX Operating System
• Servers generally run on Linux or other Unix-like systems
• UNIX was designed as a Multi-User and Multi-Tasking OS
• Various Proprietary UNIX OS like IBM AIX, SUN Solaris, SGI
IRIX, HP HP-UX etc and public domain OS like various variants
of LINUX are available.
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12. HP – Unix OS
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13. DOS (Disk Operating Systems)
• DOS consists of two parts, the kernel and the command.com which is the command
interface.
• The new Windows versions provide emulated DOS command interface (cmd).
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14. DOS
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15. Apple Operating System
• Apple introduced the Macintosh OS (Mac OS) in 1984 which
had a graphical user interface
• Apple OS was based on Unix (much like BSD Unix) and so it
has always been more robust and faster than windows.
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16. Windows Operating System
• Microsoft first introduced an operating environment named Windows in November
1985 as an add-on to MS-DOS in response to the growing interest in graphical user
interfaces (GUIs). It was a 16 Bit OS running on top of DOS providing Multitasking
and GUI
• Windows 3.0 (1990) and Windows Workgroup 3.11 (1992) improved the design and
were 16/32 Bit OS. Windows 3.1 had Internet Explorer browser as a part of the OS.
• Later came Windows 95 (1995), Windows 98 (1998) and Windows ME (2000) which
were 32 Bit OS and used FAT File System and supported DOS also
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17. How many OS are there in the market?
• Any Guess?
• https://udger.com/resources/ua-list/os
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