Host, service name, and address operations - including DNS, whois.

Person to Person Communications - user to user messages and communication (chat, talk, wall, bbs)

Electronic Mail - broad overview of electronic mail software, protocols, et al.

File Transfer and Distribution - Protocols and Methods of transfering files and directories, distributing and installing software. (file collections and archives, FTP, cvsup, NFS, et al.)

Local Process Communication - Communication between processes running on the same system. Synchronization. File locking. Signals. FIFOs, pipes, et al

Communication Debugging - Status, tracing, and debugging communications and protocols.

Identity Authentication - (including passwords, radius, identd, crypto methods, et al.)

Terminal I/O - TTY (character based display and keyboard) and related routines.

Serial I/O - Serial port use.

Remote Process Communication - Methods of communicating to remote processes. Remote Procedure Calls, sockets, data format translation, et al

Communication Implementation - (low level implementation, multicast, ppp, slip, wrappers,firewalls, et al)

(The following links to subjects at this site retain your personalized selections.)

See also User Interface - Gateway topic to presentation (like printing and graphics) and user interface routines. Textual User Interfaces Curses et al.