http://www.tac.mta.ca/tac/reprints/index.html 1. Metric spaces, generalized logic and closed categories
F. W. Lawvere
2. Triples, algebras and cohomology
Jonathan Mock Beck
3. Abelian categories
Peter Freyd
4. Cauchy characterization of enriched categories
Ross Street
5. Functorial semantics of algebraic theories and
Some algebraic problems in the context of functorial semantics of algebraic theories
F. W. Lawvere
6. Homotopy is not concrete
Peter Freyd
7. Categories and groupoids
P. J. Higgins
8. Taking categories seriously
F. William Lawvere
9. Categories of spaces may not be generalized spaces
as exemplified by directed graphs
F. William Lawvere
10. Basic concepts of enriched category theory
G. M. Kelly
11. An elementary theory of the category of sets (long version) with commentary
F. William Lawvere
12. Toposes, triples and theories
Michael Barr and Charles Wells
13. On the operads of J.P. May
G.M. Kelly
14. Enriched categories and cohomology with author commentary
Ross Street
15. Diagonal arguments and cartesian closed categories with author commentary
F. William Lawvere
16. Adjointness in foundations, with author commentary
F. William Lawvere
17. Abstract and concrete categories: The joy of cats
Jiri Adamek, Horst Herrlich, George E. Strecker
18. Seminar on Triples and Categorical Homology Theory
Edited by Beno Eckmann and Myles Tierney