A package identifier for {HEAD ~ a package} from which an application is installed on {TAIL ~ a computing device} is obtained 
A package identifier for { HEAD ~ a package } from which an application is installed on { TAIL ~ a computing device } is obtained
OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH