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SoftwareA Software is a program , which solves aspecific problem or perform a specific type

of job.

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Types Of Software

System Software

It includes the

operating system andutility programs that

control how the

hardware of a

computer works.

Application Software

Used for a specific

purpose orapplication.

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Operating Systems Operating Systems run in the

background without the users

being aware of it.

It controls the hardware and is

the link between the user and

the computer.

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Efficient Management of the

Computer Resources. Managing memory, i.e. allocating memory to

more than one program running simultaneously.

Interrupts, forEnter, Printer out of paper, or ahardware or software malfunction.

Diagnostic checks on the system on Boot up,

sending error messages where necessary.

Selecting and controlling peripheral devicesthrough small Driver programs.

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Architecture

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Utility Programs

Systems software include other utility programs.

Virus checking and cleaning.

Security using identification and passwords.

File and hard disk management for efficiency

and storage.

Customising the computer to the users

requirements, i.e. short cut menus from mouseclick.

Setting peripheral devices to the users

requirements, i.e. setting the monitor resolution.

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Popular Operating Systems

Windows XP home and business

Windows 2000 business network use

Mac Operating System GUI, graphics

OS/2 Warp commercial work

UNIX general purpose, mainframe

Linux alternative to Windows

Dos command driven

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Windows

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Apple Macintosh Desktop

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Linux

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DOS

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Types of Operating Systems

Command driven: DOS.

the user has to type in the command

it has to be in the correct syntax, errors were common

more adaptable than Windows when used by anexperienced user.

Windows, Icons, Mouse and Pull down menus.

originally developed by Apple for the Macintosh

later developed by Microsoft for Windows 3.1.

uses a mouse to click onto an icon to navigate to

programs and files.

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Programming language compilers / interpreters

that transfer a program into a computer readable

form.

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Applications Software

Used for a specific purpose or application.

Word processing;

Numerical analysis and storage;

Recording of data;

Designing and graphics;

Image processing;

Presentations; Desk top publishing;

Web design.

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Three Groups Generic:

general purpose for business;

most common applications are Word Processing,

Spreadsheet & Database.

Bespoke:

tailor made, specifically written for a specific

application.

Specific Task:

particular tasks for business;

most common are payroll, CAD, and stock control.

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Bespoke

Software that is specially written for an

application.

An expensive but a perfect solution to a

requirement when there is no suitable packageavailable.

Often a one off piece of software written for a

large organisation as a perfect match to their

needs.

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Air Traffic Control

Softwareis an example of

Bespoke

Software.

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Specific Task Software

Specific task software performs a single very

specific type of task .

Programs to work out payroll, calculate accounts,plan driving routes, work out income tax returns,

deal with stock control and handle appointments

are all examples of specific task software.

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Advantages of Integrated

Packages:

Cheaper to buy than separate packages.

All the software programs integrate together

well, i.e. mail merge, or importing a graph into aword processor.

Consistency in the programs, menus, help, etc,making them easier to learn to use.

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Disadvantages of Integrated

Packages: Cheaper packages may have weaker features

than the separate packages.Some featuresmay also be left out.

Use large amounts of disk space, may needextra resources i.e. memory to have morethan one application open.

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Appropriate Software Packages If the hardware is already in place, the software has to

be able to run on it.

Is the cost within budget?

Should it be evaluated for appropriate use?

What problems did other users have? Does it contain any bugs?

Is it easy to install and get up and running?

What technical support comes with it, is any trainingavailable, is there good documentation?

What are the details of the licence agreement?

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Thank you !