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Software
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Software is divided into parts
System software
Operating system
 Utility software

Application software
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System Software
When purchase a personal computer, it
usually has system software installed on its
hard drive.
System software consists of the programs
that control or maintain the operations of
the computer and devices.
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System software serves as the interface
between the user, the application software,
and the computer’s hardware.
Two type of system software are operating
systems and utility programs.
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Operating System
OS is a set of programs containing
instructions that work together to coordinate
all the activities among computer hardware
resources.
An operating system can run from an
optical disc and/or flash memory mobile
media, in most cases, the operating system
is installed and resides on the computer’s
hard drive.
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On handheld computers typically use
different operating systems because
operating system generally are written to
run on a specific type of computer.
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Operating System Functions
Starting and Shutting Down
cold boot and warm boot
Providing a user interface
Graphical User Interface(GUI)
Command-Line Interface
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Operating System Functions
(Cont.)
Managing Programs
Managing Memory
Coordinating Tasks
Configuring Devices
Establishing an Internet Connection
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Operating System Functions
(Cont.)
Monitoring Performance
Providing File Management and Other
Utilities
Updating Software Automatically
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Operating System Functions
(Cont.)
Controlling a Network
Administering Security
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Type of Operating Systems
Many of the first OS were device dependent
and proprietary.
A device-dependent program is one that
runs only on a specific type or make a
computer.
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Proprietary software is privately owned and
limited to a specific vendor or computer
model.
The advantage of device-independent
operating systems is you can retain existing
application software and data files even if
you change computer models or vendors.
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Stand-Alone Operating System
Stand-Alone Operating System is a
complete operating system that works on a
desktop computer, notebook computer, or
mobile computing device.
Some stand-alone operating system are
called client operating systems because they
also work in conjunction with a server
operating system.
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Can operate with or without a network.
Example: Windows Vista, Mac OS X,
UNIX, and Linux
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Server Operating Systems
Server Operating Systems is an operating
system that is designed specifically to
support a network.
Typically resides on a server.
Example: Windows Server 2008, UNIX,
Linux, Solaris, and NetWare
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Embedded Operating Systems
The operating system on mobile devices
and many consumer electronics, called an
embedded operating system, reside on a
ROM chip.
Popular embedded operating system today
include Windows Embedded CE, Windows
Mobile, Palm OS, iPhone OS, BlackBerry,
embedded Linux, and Symbian OS.
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Application Software
Application software consists of programs
designed to make users more productive
and/or assist with personal task
To make business activities more efficient
To assist with graphics and multimedia
projects
To support home, personal, and educational
tasks
To facilitate communications
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Application Software
Available in a variety of forms:
Packaged software
Custom software
Web application
Open source software
Shareware
Freeware
Public-domain software
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System software serves as the interface
between the user, the application software,
and the computer’s hardware
Utility programs
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Utility Programs
A utility program, also called a utility, is a
type of system software that allows a user to
perform maintenance-type tasks, usually
related to managing a computer, its devices,
or its programs.
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Functions provided by utility programs
include: managing files, searching for files,
viewing images, uninstalling programs,
cleaning up disks, defragmenting disks,
backing up files and disks, setting up screen
servers, securing a computer from
unauthorized access, ect.
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Business software
Business software is application software that
assists people while performing business
activities
Word Processing
Spreadsheet
Database
Presentation
Note taking
Business software for phone
Project management ect.
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