Greatest Films - An extensive review, synopsis, and discussion of the film, by Tim Dirks.

Play - Includes analysis of the film's meaning and purpose.

Ebert's Great Movies - Commentary and analysis from film critic Roger Ebert. "The genius is not in how much Stanley Kubrick does in '2001: A Space Odyssey,' but in how little."

All-Reviews.com - A small assortment of reviews.

Apollo Movie Guide - Brief summary of the film. [91/100]

Jupiter and Beyond the Infinite: A Symbolic Look at the End of 2001 - Description and analysis of the film's finale, by Michael S. Johnston.

TV Guide Online - Review [4.5/5], cast, and credits.

The Movie Vault - Brief, positive review by Josh Stoik, with plot synopsis and trivia.

Allscifi - Summary reviews and a list of literary elements and themes in the movie.

Cosmopolis - A review of Leonard F. Wheat's book on a triple allegory in 2001, a movie that "tells three hidden stories: Homer's The Odyssey; a spoofy tale based on science-fiction writer Arthur C. Clarke's idea of man-machine symbiosis; and Friedrich Nietzsche's Thus Spake Zarathustra."

Rotten Tomatoes - A dozen reviews and reactions from critics. Includes some general movie information.

Epinions.com - Consumer ratings of the movie.

New York Times - A very positive evaluation, published the day after the movie opened in 1968. Free registration required.

ReelViews - Positive review by James Berardinelli. [4/4]