Abstract Expressionism in the 50's. (Willem De Kooning, Jackson Pollack.
Transitional artists: Robert Rauschenberg, Jasper Johns, who spanned the bridge between AE and Pop.
Pop and Op Art in the 60's and 70's. Andy Warhol.
Op: Bridget Riley.
Land / Earth Art
Hard Edge painting
Performance art - Gilbert and George
Psychedelic Art - Peter Max
Installation Art - Bill Viola