Cubism is an art movement that began in the early 20th century and was pioneered by Pablo Picasso. RAID is an acronym for Rapid Application of Integrated Development, LEGER is a French painter known for his cubist works, PICASSO is a Spanish painter and sculptor who was a leader of the cubist movement, GRIS is a Spanish painter who was a major figure in the cubist movement, KLEE is a Swiss painter who was associated with cubism, PABLO is a Spanish painter and sculptor who was a leader of the cubist movement, RENE is a French painter who was a major figure in the cubist movement, WEBER is a Hungarian sculptor and painter who was associated with cubism, ERNO is a Hungarian sculptor and painter who was associated with cubism, and RUBIK is a Hungarian inventor who created the Rubik's Cube.