The Canon EOS (Electro-Optical System) autofocus 35 mm film and digital SLR camera system was introduced in 1987 with the Canon EOS 650 and is still in production as Canon's current dSLR system. The acronym EOS was chosen for Eos, the Titan Goddess of dawn in Greek mythology, and is often pronounced as a word (i.e., EE-oss), although some spell out the letters, reading it as an initialism. There is no officially correct pronunciation, as both seem logical.
As of 2007, Canon has released no fewer than 40 EOS SLR camera models, starting with the introduction of the EOS 650 in 1987. In the 1990s, Canon worked with Kodak to produce digital camera bodies, starting with the EOS DCS 3 in 1995. The first digital EOS SLR camera wholly designed and manufactured by Canon is the EOS D30, released in 2000.
Prior to the introduction of the EOS D30 digital SLR, Canon in collaboration with Kodak produced four digital SLRs by modifying the internals of the EOS-1N film SLR. These four digital SLRs had a Canon EOS body and thus can accept EF lenses, while the image sensor and electronics were designed and built by Kodak.
