Definitions:
          9 Man Lineman Ineligible
               9 players on offense and defense, full contact open hand blocking with center and two guards ineligible to receive pass. 
               5 men on line of scrimmage,  motion player allowed.
               Game closely resembles regular football rules and play.
               Live kickoffs, live punts and field goal attempts. 
               Played on regulation size fields (53 yards wide by 100 yards with two 10 yard end zones).
          8 Man Contact
               8 players on offense and defense, full contact open hand blocking with all players eligible to receive pass.
               4 men on line of scrimmage with one motion player.
               Usually played with live kickoffs, punts and field goal attempts.
               Played on regulation or abbreviated ( 45 yards wide by 80 yards with two 10 yard end zones) size fields.
          8 Man Non-Contact
               8 players on offense and defense, limited contact with all players eligible to receive the ball.
               Blockers cannot initiate contact, rushers must make the effort to go around and not through the blocker. 
               May or may not be played with live kickoffs. May kick filed goals and extra points if played on a regulation size field.
               Played on regulation or abbreviated size fields.
          8 Man Corec
               8 players on offense and defense with equal number of male and female players. Non Contact blocking.
               Rules similar to 8 man non-contact.
               Usually does not have a kicking game beyond punting the ball.
          7 Man Touch
               7 players on offense and defense with contact blocking.
               4 men on line of scrimmage.
               Rules similar to 8 man contact.
          7 Man Non Contact
               7 players on offense and defense with non-contact blocking.
               4 men on line of scrimmage.
               Rules similar to 8 man non-contact.
               This is the college intramural game.
          5 on 5
               5 players on offense and defense with non-contact blocking.
               3 men on line of scrimmage with one motion player.
               Rules similar to 8 man non-contact. Quarterback can run. Rushers are 5 yards off ball.
               Quarterback can run. Rushers are 5 yards off ball.      
          4 on 4
              4 players on offense and defense with non-contact blocking.
              3 men on line of scrimmage, no motion player.
              Rules similar to 8 man non-contact.
              Quarterback cannot run. Rushers are 5 yards off ball.