Introduction to Computing:Lecture 5

Computer Software

2

Overview

This Lecture covers: The different types of software Application software System software etc.

3

Computer Software

“Software is a program that enables a computer to perform a specific task, as opposed to the physical components of the system (hardware)”. [www.wikipedia.org]

The term “software” was first used in this sense by John W. Tukey in 1957.

The theory that is the basis for most modern software was first proposed by Alan Turing in 1935.

4

Computer Software

Software

Application software System software

5

Software

ApplicationsSoftware

SystemsSoftware

User Hardware

Role of Computer Software

6

Application Software

Application Software consists of programs that tell a computer how to produce information. Some of the more commonly used packages are:

Word processing Electronic spreadsheet Database Presentation graphics

7

Word Processing

Word Processing software is used to create and print documents. A key advantage of word processing software is that users easily can make changes in documents.

8

Electronic Spreadsheets

Electronic spreadsheet software allows the user to add, subtract, and perform user-defined calculations on rows and columns of numbers. These numbers can be changed and the spreadsheet quickly recalculates the new results.

9

Database Software

Allows the user to enter, retrieve, and update data in an organized and efficient manner, with flexible inquiry and reporting capabilities.

10

Presentation Graphics

Presentation graphic software allows the user to create documents called slides to be used in making the presentations. Using special projection devices, the slides display as they appear on the computer screen.

11

Hardware

Systems software

System Software

It lies between application software and computer hardware.The most important system software is the operating system.

Examples of operating systems:Windows, DOS, Linux, UNIX

13

What is an operating system?

An OS is a computer program that:

Controls the hardware of the computer,

Enables you to communicate with the computer.

Details would be in next lecture.

14

Summary

Details about different types of software.

Application software & system software.