chat.tar.Z
- chat Chat with up to 10 users
phone.tar.Z
- phone communicate with other users in real-time
rsend.tar.Z
- rsend send a message to another (possibly remote) user
sys5-phone.tar.Z
- sys5-phone phone another user
talk.tar.Z
- talk a set of patches that will enhance 4.3BSD talk(1)
talker.tar.Z
- talker example processes communicating over pipes
unaxcess.tar.Z
- unaxcess the Unix multi-user conferencing system