Fonds includes computer-generated scores and parts for his original works, as well as his many arrangements for violoncello ensembles of works by other composers, written 1965-2006. Many of the arrangements were done for The Yale Cellos; Aldo Parisot and The Yale Cellos; Shauna Rolston; The Banff Violas; Lee Armstrong and the Birmingham Cello Group. Many contain program notes.
Fonds consists of records created during Ron Collier's career as a performer, composer, arranger, teacher, and band leader. The fonds includes manuscripts of Collier's arrangements and original compositions; correspondence with musicians; photographs; lecture notes from his career at Humber College in Toronto, Ontario; and records from his collaborations with Duke Ellington. Fonds also contains audio and video recordings of performances and lectures.