The monolith shown above is symbolic in that it marks leaps in human evolution and seems to play a key role in the films tension. These theme of the monolith being a catalyst for change is evident in multiple scenes whether good or bad. Although the monolith is never given a clear explanation in the film, its presence is felt throughout and urges the viewer to piece together what exactly its purpose is.

Another great example of Kubrick's use of symbolism in this film is with the HAL 9000 computer. HAL represents the dangers of overreliance on technology and the potential loss of human control. HAL's calm, emotionless voice contrasts with its increasingly erratic and dangerous behavior, highlighting the tension between man and machine. These eerie elements add so much depth to the film and make it such an engaging experience.