The docking bay replaces {HEAD ~ either a hard disk drive} or a floppy disk drive in {TAIL ~ the personal computer} 
in
The docking bay replaces { HEAD ~ either a hard disk drive } or a floppy disk drive in { TAIL ~ the personal computer }
OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL