CEKM meaning in General ?

The American Institute of Musicology (AIM) is a musicological organization that researches, promotes and produces publications on early music. Founded in 1944 by Armen Carapetyan, the AIM's chief objective is the publication of modern editions of medieval, Renaissance and early Baroque compositions and works of music theory. Among the series it produces are the Corpus mensurabilis musicae (CMM), Corpus Scriptorum de Musica (CSM) and Corpus of Early Keyboard Music (CEKM). In CMM specifically, the AIM has published the entire surviving oeuvres of a considerable amount of composers, most notably the complete works of Guillaume de Machaut and Guillaume Du Fay, among many others. The CSM, which focuses on music theory, has published the treatises of important theorists such as Guido of Arezzo and Jean Philippe Rameau. The breadth and quality of publications produced by the AIM constitutes a central contribution to the study, practice and performance of early music.

Since 1946, the AIM has published Musica Disciplina, an annual academic journal of early music scholarly work. Musicologists who have been particularly associated with the AIM include John Caldwell, Frank D'Accone, Ursula Gunther, Charles Hamm and Gilbert Reaney. The AIM is based in Rome, with offices in Cambridge, Massachusetts.