Software refers to the non-tangible components of computers, known as computer programs. Computer

software and hardware require each other and neither can be realistically used without the other.

COMPUTER SOFTWARE

DIFFERENCE BETWEEN SYSTEM SOFTWARE & APPLICATION SOFTWARE

System Software Application Software

Enables the computer to function properly.

Usage

Enables users to work efficiently with documentation such as letters, accounting reports and presentations.

Compulsory each computer must

have a system software to function.

Need

Optional depends on usage and needs. Without an application software,the computer is still able to function.

Each computer only needs onesystem software

Number OfSoftware

Each computer can have more than one application software.

Independent - system software can function without an application software.

DependencyDependent - application software cannot work without system software.

WHY TO USE SYSTEM SOFTWARE &

APPLICATION SOFTWARE?

TYPES OF SOFTWARE

Types of Software

System Software Application Software

Translators• Interpreter

s• Compilers

OS• Dos• Window

s• Unix

Packages• Linker• Loader• Editors

Application Package / Tools• M.S Word• M.S Excel

Special Purpose Software• Accounts• Payroll• Inventory

OPERATING SYSTEM

The term DOS can refer to any operating system, but it is most often used as a shorthand for MS-DOS(Microsoft disk operating system). Originally developed by Microsoft for IBM, MS-DOS was the standard operating system for IBM-compatible personal computers.

DOS is still 16-bitoperating system and does not support multiple users or multitasking.

Disk Operating System

Microsoft Windows is a series of graphical interface operating systems developed, marketed, and sold by Microsoft.

Microsoft introduced an operating environment named Windows on November 20, 1985 as a graphical operating system shell for MS-DOS in response to the growing interest in graphical user interfaces (GUI).Microsoft Windows came to dominate the world's personal computer market with over 90% market share, overtaking Mac OS, which had been introduced in 1984.

Windows

OPERATING SYSTEM

Unix (officially trademarked as UNIX) is a multitasking, multi-user computer operating system that exists in many variants. The original Unix was developed at AT&T's Bell Labs research center by Ken Thompson, Dennis Ritchie, and others.

UNIX

OPERATING SYSTEM

TRANSLATORS

A program that executes instructions written in

a high-level language. 

Interpreters

A program that translates source code into object code. 

Compilers

TRANSLATORS

DEBUGGERS

A special program used to find errors (bugs) in other programs. A debugger allows a programmer to stop a program at any point and examine and change the values of variables.

ASSEMBLERS

A program that translates programs from assembly language to machine language.

FILE MANAGEMENT SYSTEM

The system that an operating system or program uses to organize and keep track of files. For example, a hierarchical file system is one that uses directories to organize files into a tree structure.

PACKAGES

In computer science, a linker or link editor is a computer program that takes one or more object files generated by a compiler and combines them into a single executable program.

Linkers

TYPES OF SYSTEM SOFTWARE

Single program  operating system: DOS Assembly language

Multi-tasking operating system Windows Linux Android

APPLICATIONS SOFTWARE:

APPLICATIONS SOFTWARE

Apply to real-world tasks

Solves user problems

vs.

OS controls the hardware

SOFTWARE CHARACTERISTICS

User-friendly

Easy

Minimum training and documentation needed

to use

PURCHASING COMMERCIAL SOFTWARE

INDIVIDUALS Software warehouse store Mail order Electronic software distribution

WORD PROCESSING

Uses Memos Reports Correspondence Minutes of meetings Anything to be typed

Functions Create Edit Format Store Print text and graphics

ELECTRONIC SPREADSHEETS

Uses Comparing mortgage interest rates Preparing budgets Tracking weight loss

Functions Manipulates numbers in rows and columns Recalculates the results when a number is changed What if?

ELECTRONIC SPREADSHEETS

DATABASE MANAGEMENT

Uses Keep track of a large number of related facts Query the data for specific information Retrieve information in a variety of ways

Functions Store data Update data Manipulate data Retrieve data Print data in many forms Report on data in a variety of ways

GRAPHICS

Uses Maps Graphs Charts

Helps to Compare data Spot trends Make decisions

Visual information is more compelling

PRESENTATION GRAPHICS

Uses Sales tool Demonstrate a product Show cost/benefit projections on charts Present audio/video testimonials from satisfied

customers May contain

Text Graphics Audio Video

COMPUTER ART

Use software to Produce art Express ideas

Graphic artist Artistic ability Computer skills Produces computer art

COMMUNICATIONS

Provides method for communicating between computers

Most likely way to connect is via the Internet

Use a browser to access the Internet

BUSINESS SOFTWARE

Custom-written to meet special business needs

Standard packages

Combination of custom-written and off-the-shelf

COMPUTERS AND PEOPLE

Users Any individual who

operates a computer to accomplish a task

Home Business

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