This standard defines the command set extensions to facilitate operation of optical memory card devices. The clause(s) of this standard pertaining to optical memory card device class, implemented in conjunction with the applicable clauses of the ISO/IEC 14776-311 SCSI-3 Primary Commands (SPC) and the ISO/IEC 14776-321 SCSI-3 Block Commands (SBC), fully specify the standard command set for optical memory card devices.