System Calls and Networking
: Conventions employed by the POSIX interface.
Ports and File Descriptors
: Scheme ``ports'' and Unix file descriptors have different representations.
: stat, chown, chmod, etc.
: Retrieving a user's GECOS (/etc/passwd) entry.
: gettimeofday, localtime, strftime, etc.
: Accessing and modifying Guile's environment.
: getuid, getpid, etc.
: sigaction, kill, pause, alarm, setitimer, etc.
Terminals and Ptys
: ttyname, tcsetpgrp, etc.
: Communicating data between processes.
: gethostbyaddr, getnetent, socket, bind, listen.
: Obtaining information about the system.
: setlocale, etc.