Howard Gardner's theory of multiple intelligences proposes that intelligence is composed of distinct abilities or intelligences rather than a single general ability. The document discusses eight intelligences identified by Gardner: verbal-linguistic, logical-mathematical, spatial, bodily-kinesthetic, musical, interpersonal, intrapersonal, and naturalist. Each intelligence has its own operating system in the brain and involves different skills. While the intelligences operate independently in the brain, they typically work together to complete real-world tasks.