Operator algebras originated in the early 1900’s through the seminal work of von Neumann, which was inspired by his search for a natural mathematical framework for quantum mechanics and numerous other mathematical challenges from the theory of operators on Hilbert spaces. The Canadian Operator Symposium (COSy) was founded by Israel Halperin in 1972, and has grown into the main annual conference for the operator algebras and operator theory community in Canada. This symposium draws leading researchers from around the world to discuss the most interesting recent developments, provides a forum for Canadian researchers to publicize their results, and gives a vital learning experience to young researchers entering the field.