Software

C31102 IT 2

Computer Center

Pluakdaengpittayakom

Meaning of Software

Software is group of commands created from programming language

Need of software

Software help human can control computer and make profit from it.

Programming Language

Media between computer and human

Computer can understand only binary number or machine language

Programming Language(cont)

Machine language is hard to understand then language translator be created for translate high-level language to machine language

Language translator divide 2 types 1) Compiler and 2) interpreter

Compiler vs Interpreter

Compiler will check all code before translate to program

Interpreter will translate one statement and run it

Type of software

We can divide software to 2 types

System softwareApplication software

System software

Control hardware such as get data from keyboard, send data to monitor, etc.

start working when computer will be turned on.

Function of system software

Manage Input and OutputManage MemoryCoordinate between

Hardware and Application software

Subtype of System software

System software also divide to 2 subtype

Operating System : OSCompiler

Operating System : OS

Low level software that used for maintenance Hardware

All computer must install OS

Example of OS

DOS : Disk Operating System work in command line mode

Windows : work in graphic mode, multitask mode, easy to use

Example of OS

OS/2 like Windows, built by IBM, few difference about command

Linux , Freeware OS, Multi user platfrom

Language Translator

Used for translate source code to machine language

Help programmer can program easier

Example of Programming language

PASCAL : structure programming language

BASIC : easy commandC : flexible & HW friendly programming

languageLOGO : child learning languageFORTRAN, COBOL, RPG ,etc

Application Software

Software work on specific task can divide in 2 type

Ready-made softwareSpecific-task software

Ready-made software

Built to buy moreLike deliExample of Ready-made software

such as word processing, spread sheet, database management, presentation, data communication

Low price but not fitness

Word processing software

Use for create, edit, format and print document

Such as Microsoft Word, Lotus Ami-Pro etc.

Spread Sheet Software

Use for calculating, define formula and processing

Such as Microsoft Exel, Lotus.

Database Management Software

Use for create, manage, query and make summary report on various format.

Such as Microsoft Access, DB2, Oracle, Foxbase, etc.

Presentation Software

Use for create presentation in various format

Such as Microsoft Powerpoint, Lotus Freelance, Harward Graphic, etc.

Data communication software

Make computers can communicate

Such as Internet Explorer, ProCom, CrossTalk, Telix, etc.

Specific-task software

Make by orderLike command food.Such as 7-11 Account program, PISHigh cost but fitness.

Software

System Apply

OS Translator

Ready-made

Specific Task

Summation