Computer systems

Computer systems

1. Off the shelf

   • Buy in store
   • Examples: -Microsoft office -Adobe
   • Lots of online support and don't need extensive training for employees.
   • Heavily tested.

2. Open source software

   • view and modify code
   • Examples: -Linux -VLC media player
   • Either free or very cheap
   • You can study, edit and improve the source code
   • Credit all previous contributors
   • Let modifications legal for other users.

3. Custom written software

   • Software made for a specific task
   • An example is that Sainsbury's may have their own stock control system.
   • Software developers meet with clients to produce the idea so it meets every need.
   • Very expensive as takes a lot of time to create
   • Need to train employees to use it.

4. Proprietary software

   • Illegal to make copy's or share
   • Software that can't be copied or altered without owners permission.
   • Most off the shelf is proprietary because it has a licence.