Designs, manufactures, sells and leases projection systems for large-format theatres including commercial theatres, museums, science centres and destination entertainment sites. Also designs and manufactures high quality sound systems and produces and distributes large-format films. The company derives revenue principally from long-term theatre system lease and sale agreements, maintenance agreements, film distribution and production agreements, as well as from the operation of its own theatres, camera rentals and post-production services. At Mar. 31, 2010, there were 438 IMAX theatres (316 commercial and 122 institutional) operating in 47 countries.