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Lesson 6B. Introduction to Computers. UNIX. Oldest operating system, developed by Bell Labs in the 1970s Still used today in insurance, medicine, banking, manufacturing and Web servers. MS-DOS. Most popular PC operating system during the 1980s and early 1990s, now obsolete, not really.

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Introduction to Computers

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Lesson 6B

Introduction to Computers


UNIX

  • Oldest operating system, developed by Bell Labs in the 1970s

  • Still used today in insurance, medicine, banking, manufacturing and Web servers


MS-DOS

  • Most popular PC operating system during the 1980s and early 1990s, now obsolete, not really.

  • Command-line interface

  • One program at the time

  • One user and a single processor

  • Designed to recognize only 1 MB of RAM

  • Wide variety of program-specific interface

  • Was designed for 16-bit CPU

  • Hardware difficult to install

  • File names are limited to 8 characters

  • Command line interface to be difficult


Macintosh

  • Offered first graphical user interface beginning in the mid-1980s

  • Still popular with publishers, multimedia developers, graphic artists and schools

  • At the beginning was ahead of Windows with many other features like built in network support and plug and play Hardware support.

  • The fact that Mac OS works only on Macintosh computers it is one of its drawbacks.


Windows 3.X

  • Windows was Microsoft’s first graphical user interface, introduced in the mid-1980s

  • Operating environment, not operating system, that ran on top of DOS

  • Windows 3.0 introduced in 1990 was Microsoft’s first successful version of Windows

  • Windows 3.x refers to more than one member of the Windows 3 family, now considered obsolete


OS/2 Warp

  • Graphical user interface developed in 1982 jointly by IBM and Microsoft for Intel microprocessors

  • Now obsolete


Windows NT

  • Introduced in 1993

  • Windows NT Workstation still used in architectural firms, audio and video production studios and graphics studios

  • Microsoft stopped supporting Windows NT in 2001


Windows 9X

  • Released in 1995, Windows 95 was the first member of the Windows 9x family

  • Windows 98 considered to be an upgrade of Windows 95

  • Released in 2000, Windows ME was the last member of the Windows 9x family, still widely used, but considered by experts to be obsolete


LINUX

  • Released in late 1990s

  • New version of UNIX

  • Distributed for free


Windows 2000

  • Released in 2000

  • Combined the features of Windows 98 and Windows NT

  • There are many types of windows 2000 which are: Professional, Server standard edition, Advanced server, Data Centre Server


Windows XP

  • Released in 2001

  • Available in two editions: home and professional

  • Has advanced features like: Digital Media Support, Advanced Networking and Communications, Advanced Mobile Computing.


Windows .Net

  • Latest addition to the server-based Windows OS family includes the following: Application centre, BizTalk Server, Commerce Server, Exchange Server, Internet security and acceleration Server, Mobile Information Centre, Share-point Portal Server and SQL Server


Embedded Operating Systems

  • Built into an electronic device’s circuitry

  • Found in devices such as PDAs


Three most popular embedded operating systems:

  • Palm OS

  • Windows CE

  • Pocket PC OS


Lesson 6B

  • PC Operating Systems


Review Questions

  • What is the oldest operating system?

  • What was the most popular operating system in the 1980s?

  • Which operating system was the first graphical user interface?

  • When was Windows first introduced?


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