IT text book revision, pages 17-20

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Pages 17-20

Utility software:

Utility software is system software that runs alongside the OS to distinguish between applicaitons and to carry out routine tasks to maintain and optimise the system operation.

Purpose, features and uses:

  • Security checks
  • Identifying and removing viruses
  • Cleaning up files
  • Software updates
  • Backing up data
  • Issuing warnings or alerts that updates or backups are required.
  • Managing peripheral devices

Another use of utility software is for it to gather data to clean up the system and speed up the performance by searching for junk data and removing it. This will free up internal storage space however, utility software itself may take up significant memory.

Open source and proprietary operating systems and software:

The source code is behind all operating systems and software. 

HTML - Hypertext Markup Language

Open source software:

Open source software is often free for users to download onto their computer and allows them to customise it to suit their needs.

Advantages:

  • Free to use
  • Customisable 
  • Easy to use

Disadvantages:

  • May have limited features compared to paid software
  • Less support (e.g phone number, email). Users would have to search forums to access support.
  • May not be compatible with some applications.
  • Copied and editited so it can harm users.

Propiertary:

Propieratry software is privately made and owned by companies where users can only use it if they pay for it. E.g Microsoft, Apple, Sage, Pegasus.

Advantages:

  • Will be reliable
  • Branded
  • Good compatibillity
  • Good support
  • Frequent updates
  • More secure

Disadvantages:

  • Cost
  • Can't customise it 
  • Restricts development to particular employed or contracted programmers

Impact and features of user interfaces in computer software:

User interfaces create that virtual link from humans to computers. The command line is the point at which the user enters command text sequences which instructs the computer to perform a task. GUIs make this much easier for users to do.

GUI advantages:

  • Easy to use, requires little or no training.
  • Providing a creative and effective way for disabled users to use it.

Features of common…

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