The apparatus may include a single processor configured to execute multiple processes concurrently, or multiple processing units, {HEAD ~ each} configured to execute {TAIL ~ one or more processes} 
configured to execute
The apparatus may include a single processor configured to execute multiple processes concurrently , or multiple processing units , { HEAD ~ each } configured to execute { TAIL ~ one or more processes }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL