+/- are a way to keep track of how many times a player is on the ice when
his team scores and when they are scored against.
 
When teams are at even strength, if team "A" scores, then the skaters from
team A on the ice at the time of the goal gets a "+" and the players from
team "B" get a minus.  In the NHL, if Team "A" scores while shorthanded,
then the team A players get plus, and team B skaters get a minus.
 
Rita-Ann Monde
Trinity College '91
Cornell University '9?