SCSI command
The SCSI command architecture was originally defined for parallel SCSI buses but has been carried forward with minimal change for use with Fibre Channel , iSCSI , Serial Attached SCSI , and other transport layers . 
<triplet> SCSI command <subj> parallel SCSI <obj> used by <subj> Serial Attached SCSI <obj> used by <triplet> Serial Attached SCSI <subj> SCSI command <obj> uses