IM = International Master, need to have had FIDE rating above 2400, plus have scored three IM norms.
FM = FIDE Master, need to have had rating above 2300,
CM = Candidate Master, need to have had rating above 2200.
There is no SGM, but there is GM (sometimes called IGM, International Grandmaster). You need 2500+ and three norms.
THERE ARE ALSO ELITE GRANDMASTERS, MAYBE NOT OFFICIALLY ,,BUT STRONGEST G MS ARE OFTEN CALLED ELITE G MS.. (RATING ABOVE 2700 )
Is is true that the title "national master" is arbitrary? Like, let's say that the Bahamian counterpart to the USCF could decide to make anyone a NM, maybe for a large donation? It would be anologous to buying into the nobility.
IM = International Master, need to have had FIDE rating above 2400, plus have scored three IM norms.
FM = FIDE Master, need to have had rating above 2300,
CM = Candidate Master, need to have had rating above 2200.
There is no SGM, but there is GM (sometimes called IGM, International Grandmaster). You need 2500+ and three norms.
wow that helped! Thanks! 
What is the meaning of IM, FM, CM and is that true there is SGM? (Super Grand Master)