200 Medley Relay: Team of four swimmers each swimming 50 yards (2 lengths) #1 Backstroke, #2 Breaststroke, #3 Butterfly, #4 Front Crawl (Freestyle). 

200 Freestyle: One swimmer swimming 8 lengths freestyle/front crawl. 

200 Individual Medley (I.M.): One swimmer swimming 8 lengths using four different strokes each 50 yards (#1 Butterfly, #2 Backstroke, #3 Breaststroke, #4 Front Crawl [Freestyle]). 

50 Freestyle: One swimmer swimming 2 lengths of freestyle/front crawl. 

100 Butterfly: One swimmer swimming 4 lengths butterfly. 

100 Freestyle: One swimmer swimming 4 lengths freestyle/front crawl. 

500 Freestyle: One swimmer swimming 20 lengths freestyle/front crawl. 

200 Freestyle Relay: Team of four swimmers each swimming 50 yards (2 lengths) freestyle. 

100 Backstroke: One swimmer swimming 4 lengths backstroke. 

100 Breaststroke: One swimmer swimming 4 lengths breaststroke. 

400 Freestyle Relay: Team of four swimmers each swimming 100 yards (4 lengths) freestyle.