Common Command Set(CCS) Additional requirements and features for direct-access {SCSI} devices. In 1985 when the first {SCSI} standard was being finalised as an {American National Standard}, the {X3T9.2} Task Group was approached by some manufacturers who wanted changes. Rather than delay the SCSI standard, X3T9.2 formed an ad hoc group to define CCS. [Spec? Status? "direct-access"?] (1997-03-23)