Those included stored memory (the ability to hold both a storedprogram and data), conditional control transfer, which allowed the computer to stop and be resumed, and the central processing unit, which allowed all computer functions to be coordinated through one source.
Jets defensive coordinator Mike Pettine got onto Billick's staff in 2002 by getting someone to convert some 5, 000 play diagrams Billick had stored in an Apple format into a more easily transferrable program.