A-Level Computingtypes and uses of software

Objectives•Know that software can be split into

different categories

•Know what each type of software is used for

•Understand how software deals with the jobs it is given

Software•All programs that run on a computer

•Perform many different jobs and roles

•Can be split into several categories

Software•Systems software

•Application software

•Special Purpose

•Bespoke software

•Some software will could be put into many different categories.....

Systems software•Performs tasks needed to run the

computer system

•Operating systems

•Library programs

•Utility programs

•Programming languages

Operating systems•every computer needs and operating system

•Works in between the hardware and the user.

•A set of programs which allows the user to perform tasks without knowing how they are done (e.g. save)

•Windows, Apple OS, Linux (PC’s)

•iOS, Android, Blackberry OS (smart phones)

Library Programs•Available to all users of the computer

•Performs common tasks needed by users

•e.g. restoring lost files

•similar to/often called utility programs

Utility Programs•Makes life easier for users of a computer

•Sorting files

•Copying files for backup

•Compressing files (.zip files)

Programming Language

•Compilers, interpreters and assemblers.

•Used to convert programming code into statements a computer can then perform and run.

Applications Software•Carry out some task for the user that’s

seperate from computers

•Writing a letter

•Editing an image

•Creating wage slips

General purpose•Word processors, spreadsheets, desktop

publishing, databases etc.

•Sold as a package, mass produced as sold as such

•Suites offer many applications in one package

•Can be made to do many different tasks

Special Purpose•Performs a specific Task

•e.g. payroll, stock control, accounts, filling in tax returns

•Only designed to do one task only

Bespoke Software•Designed for a particular one off type of job

•Usually specific to a customer

•Written to a special specification for a particular customer

Choices?•Bespoke software offers a solution just for the

customer, specialised for them

•No unwanted features

•May not be another option

•Costs much more

•General purpose is quicker to install, no need to be developed, can be supported by others who uses it.

•Good level of help/documentation