1. Bulletin board service (BBS)
An on-line service provided through the network.
When users join a BBS, they take part in group discussions around the world by reading messages left by other users
They contribute their own points
It also acts as a source of professional contacts.

2. Information services
Many companies provide information services to which users can subscribe.
By accessing an information service, a user can tap into a variety of on-line services, such as reservation systems, reviews, commodity prices, stock prices, articles and reports.

3. Telecomputing and Teleconferencing
Enable working executives to work at home and thus reduce travel time and improve productivity.

4. Workgroup computing
Made possible with groupware features that support electronic mail, voice mail, public calendars, meeting schedules, electronic voting and document sharing.

5. Electronic funds transfer (EFT)
Uses a computer network to handle financial transactions between banks, buyers, and sellers.

6. Electronic data interchange (EDI)
allows the exchange of business documents electronically between two or more organisations.

7. Electronic commerce
refers to the conduct of trading using computer networks. It may include electronic mail, electronic funds transfer, and electronic data interchange.