Disk Operating System
( DOS )
Windows 1.0 was released on
November 20, 1985 as the first
version of the
Microsoft
Windows
line. It runs as a
graphical
, 16-bit mult-tasking shell
on top of an existing
MS-
DOS
installation
Windows 2000 is an operating
system for
use on both client
and server computers
. It was
produced by Microsoft and
released to manufacturing on
December 15, 1999
Windows XP
(codenamed
Whistler) is a
personal computer
operating system
produced by
Microsoft
The operating
system was
released to
manufacturing on
August 24, 2001
Windows Vista
(codenamed is an
operating system by
Microsoft for use on
personal computers,
including home and
business desktops,
laptops, tablet PCs
and media center
PCs.
Development was
completed on
8,November 2006
Windows 7
(codenamed
Vienna, formerly
Blackcomb) is a
personal computer
operating system
developed by
Microsoft.
Windows 7 was
released to
manufacturing on
22 July 2009
Windows 8 is a
personal computer
operating system
developed by
Microsoft as part
of the Windows NT
family of operating
systems.
The operating
system was
released to
manufacturing on
1 August 2012
Windows Phone 8
is the second
generation of the
Windows Phone
mobile operating
system from
Microsoft. It was
released
on
October 29, 2012
,
and like its
predecessor, it
features a flat user
interface based on
Metro design
language
Windows 10 is a
personal
computer
operating system
developed by
Microsoft as part
of the Windows
NT family of
operating
systems.
Officially
unveiled in
September 2014
Android is a mobile operating
system (OS) based on the Linux
kernel and currently developed by
Google. With a user interface
based on direct manipulation,
Android is designed primarily for
touchscreen mobile
Initially developed by Android,
Inc., which Google bought in
2005, Android was unveiled in
2007.
iOS is another
type of operating
system like
ANDROID
enables users to
use
smartphones
The main credit
of development
of iOS’
development
goes to
STEVE
JOBS.
•
UNIX:
Command-line, character-based OS
•
Internet is populated with computers running UNIX
•
OS of choice for workstations and mainframes in research and academic settings
•
Favored by many who require an industrial-strength, multiuser OS
•
Linux, a UNIX clone, is distributed and supported free
UNIX and Linux
Compatibility Issues
•
A
file
is a collection of bytes of information treated as a single unit.
•
It is given a
name
to make it easy to find and use later.
•
The
file system
keeps track of where a file is actually resident on a disk.
•
A disk (hard disk, floppy, optical disk) is subdivided into
directories
or
folders
.
File System
•
The top level folder on a disk is known as the
root
.
•
The root is generally subdivided into
subfolders
.
•
Any folder or subfolder can contain files and other folders.
•
The
fully-qualified filename
includes the name of the file and the
path
to the
folder in which it resides:
c:\courses\01\ict\ICTlec3.ppt
File System (continued)
•
A particular file extension can be
registered
and
associated
with a
particular program.
•
.docx files are associated with MS Word
•
.xlsx files are associated with MS Excel
•
.txt files are associated with Notepad
•
.html files are associated with IE
•
This is how Windows knows what to do when you double-click a file in
My Computer.
Windows Registered File Types
THANK YOU!
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