The Boller and Chivens CCD Spectrograph (CCDS) is a conventional optical grating spectrograph operating in the 320-950nm region. It is used on the MDM Observatory 2.4-m and 1.3-m telescopes as a facility instrument. It was acquired by the Ohio State University through a grant from the National Science Foundation in 1970 for stellar spectral classification programs and was used for 28 years (1970-1998) on the Perkins 1.8-m telescope on Anderson Mesa in Arizona, starting out as a photographic spectrograph, then progressively upgraded first with an intensified image tube camera, and then in 1986 to use its first CCD. It was moved to MDM in 1999 after a final CCD retrofit where it is still in operation with a long and productive history.