[BSG] I/O Interfacer A unique facility in 6180 Multics that allows any user granted the appropriate access to actually run the physical I/O of hardware devices directly to and from his or her segments IOI relies on the protection (base and bounds) registers of IOM channels, and page control services for temporarily locking pages in core at absolute, contiguous addresses as required for such use The printer and backup daemons as well as On-line T & D use it One of Noel Morris's proudest masterpieces