H stands for Hold'em

O for Omaha Eight or Better (i.e. Omaha hi-low (split-8 or better) , or simply Omaha/8 )

, 😄 or simply ) S for 7 Card Stud

E for 7 Card Stud Eight or Better

This form of poker is considered 😄 harder and not for beginners since it requires players to be skilled at many different forms of poker to succeed.[1] 😄 It is also commonly played at casino tables. Players must have a great deal of concentration as well to not 😄 confuse which game is being played.