 | 1.Broadcast -- Push
 | impose the tv model on the Internet. A stream of preselected pages are sent to your browser.
| | 2.Selective -- Pull
| The surfing model: by searching and browsing.
| | 3.Responsive -- Interactive
| Email, threaded discussions, read news (major use of Internet)
| | 4.Discourse -- Collaborative
| Chat rooms, mudds(popular outside academia)
| | 5.Self-publish
| personal home pages (flood of tools, books)
| | 6.Sharing
| digital libraries, artifact repositories, on-line code libraries(many commercial repositories)
| | 7.Organizational information -- Intranet
| Local group information; forms-base (focus for big guns)
| | 8.Organizational coordination -- Groupware
| Meeting scheduler, joint authoring, | | | | | | | | |