afbackup is a client-server backup system allowing many workstations to backup to a central server either simultaneously or serially. Backups can be started remotely from the server or via cron jobs on the the clients. Any streaming device, including a drive partition acting as a "virtual" tape changer, can be used for storing data. Autochangers can be used, if an appropriate auxiliary program, such as mtx or stctl, is available and working. afbackup has been tested on Linux, AIX, IRIX, FreeBSD, Digital Unix (OSF1), Solaris and HP-UX. The clientside has also been tested on SunOS and OpenBSD.