This is software developed for profit by a company. The source code is kept as a valuable trade secret with only the complied code released. Users buy a licence to use it.
Advantages
- There is someone to go to if there is a problem
- Should have been extensively tested
- Updates are scheduled regularly
Disadvantages
- Can be expensive
- May be inflexible to user's needs
- Deliberate incompatibilities may be introduced so users can get locked in
Comments
No comments have yet been made