1. Preface

   EditorialNotes Pages: iii - iv

2. The development and prospects for category theory

   • Saunders Mac Lane

   OriginalPaper Pages: 129 - 136

3. Samuel Eilenberg's work in category theory

   • Saunders Mac Lane

   BriefCommunication Pages: 137 - 138

4. Some geometric aspects of the calculus of fractions

   • Jean Bénabou

   OriginalPaper Pages: 139 - 165

5. Unity and identity of opposites in calculus and physics

   • F. William Lawvere

   OriginalPaper Pages: 167 - 174

6. Homotopy theory, and change of base for groupoids and multiple groupoids

   • Ronald Brown

   OriginalPaper Pages: 175 - 193

7. Categorical aspects of equivariant homotopy

   • Jean-Marc Cordier
   • Timothy Porter

   OriginalPaper Pages: 195 - 212

8. Models for homotopy n-types in diagram categories

   • Antonio R. Garzón
   • Jesús G. Miranda

   OriginalPaper Pages: 213 - 225

9. On geometric and finitary sketches

   • Jiří Adámek
   • Jiří Rosický

   OriginalPaper Pages: 227 - 240

10. Algebraic theories, clones and their segments

    • Věra Trnková

    OriginalPaper Pages: 241 - 249

11. On fixpoint objects and gluing constructions

    • Roy L. Crole

    OriginalPaper Pages: 251 - 281

12. Generalized logic and the representation of rings

    • Simon Ambler
    • Dominic Verity

    OriginalPaper Pages: 283 - 296

13. Arithmetical categories and commutator theory

    • M. C. Pedicchio

    OriginalPaper Pages: 297 - 305

14. Mal'cev categories and fibration of pointed objects

    • Dominique Bourn

    OriginalPaper Pages: 307 - 327

15. Categories of algebraic sets

    • Yves Diers

    OriginalPaper Pages: 329 - 341