In this embodiment, the program guide includes a matrix of {TAIL ~ cells}, with each cell containing information associated with {HEAD ~ a television program} 
In this embodiment , the program guide includes a matrix of { TAIL ~ cells } , with each cell containing information associated with { HEAD ~ a television program }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD