U.S.P.S.A United States Practical Shooting Association
I.P.S.C. International Practical Shooting Conference(?)
G.S.S.F. Glock Sport Shooting Foundation.
D.C.M. I think is Department of Civillian Marksmanship
I.D.P.A I Don't Practice Anymore or It Doesn't Please Anyone. (j.k)
[This message has been edited by Tony N (edited June 07, 1999).]