| Software Lives In ... | Legal Status | ||
| Free Software | Licensed Software | ||
| ...the release (download to the local disk) | Examples | OLC and Zephyr | AFS, Motif, transcript, track |
| Legal | No restrictions | Restrict downloads to those on Net 18 or who have certificates | |
| Fee | None | None | |
| ... a locker (add/attach foo) | Examples | gnu and sipb software | Matlab, Splus |
| Legal | No restrictions | Restricted to MIT or to Athena; Machine needs Hesiod client, Kerberos, and AFS to run this | |
| Fee | None | Some is free; the rest requires registration and payment of a Software Fee | |