The Fonds consist of both personal and professional correspondence relating to his mathematical career. Colleagues and friends from the mathematical profession have provided letters (incoming/outgoing), publications, newspaper and magazine clippings, and CVs over the course of 66 years. Correspondence comes from H.S.M. Coxeter, Donald O.Hebb, Paul Erdos, Bela Bollobas, John Conway, Janos Komlos, J.A.H. Hunter, and other notables within the field of mathematics. In all, they comprise of 1.11 m of textual records, as well as 20 photographs depicting family and friends of Dr. Moser's and a painting; includes one audiotape and one CD.