CMPF124 Basic Skills For Knowledge Workers Chapter 1 – Part 1 Introduction To Windows Operating Systems CMPF 112 : COMPUTING SKILLS

Objectives At the end of the lesson, you should be able to : –describe the concept and functions of an operating system (OS) –describe the 3 categories of OS –differentiate among different versions of Microsoft Windows

What Is An Operating System ? Serves as intermediary between hardware and applications software Handles technical details without user intervention A Collection of programs –Systems software –Kernel –Utilities –Device drivers –Language translators

OS Functions Determines which applications should run in what order and how much time should be allowed for each application before giving another application a turn (in multitasking OS). It manages the sharing of internal memory among multiple applications. It handles input and output process. It sends messages to each application or interactive user about the status of operation and any errors. It can offload the management of what are called batch jobs so that the initiating application is freed from this work (i.e. print spool). It can manage how to divide the program (in parallel processing).

Operating System Categories Three basic categories –Embedded OS Used in handheld computers, Stored within device in Read-Only Memory Windows CE (embedded compact), Palm OS, Android, Symbian, NetBSD –Network OS  Controls and coordinates linked computers Novell NetWare, Windows NT Server, UNIX, WINDOWS Server 2012 –Stand-alone  Desktop/ Personal Computer Operating system Controls a single desktop or laptop computer Client operating system MS-DOS, Windows Vista, 7, 8, Mac OS X, Linux

MS-DOS Uses a command-line interface –Screen provides prompts for user –User types commands Not user-friendly

Microsoft Windows Most popular OS for personal computer Designed for INTEL processors Active Desktop –Graphical user interface to OS Windows XP, Windows 2003, Vista, Windows 7, Windows 8 Windows CE

Apple MacOS Runs on Macintosh computers Designed for PowerPC microprocessors OS X Mountain Lion - > Latest version OS First commercially successful GUI –Has served as the model for Windows and other GUI products developed since then

UNIX Originally ran on mainframe and minicomputers Used for large servers on the Web Popular alternative to Windows Several versions available –Solaris 8 –Linux

Windows 98 GUI copyright image from WINDOWS 98

Windows XP GUI copyright image from WINDOWS XP

Windows Vista GUI copyright image from WINDOWS VISTA

WINDOWS 7

Google Chrome OS