| MSC 1991 | Number of Preprints | |
| 90-XX | Economics, operations research, programming, games
| 80 | browse |
| 90-00 | General reference works (handbooks, dictionaries, bibliographies, etc.)
| 80 | browse |
| 90-01 | Instructional exposition (textbooks, tutorial papers, etc.)
| 80 | browse |
| 90-02 | Research exposition (monographs, survey articles)
| 80 | browse |
| 90-03 | Historical
| 80 | browse |
| 90-04 | Explicit machine computation and programs (not the theory of computation or programming)
| 80 | browse |
| 90-06 | Proceedings, conferences, collections, etc.
| 80 | browse |
| 90-08 | Computational methods
| 80 | browse |
| 90Axx | Mathematical economics
| 19 | browse |
| 90Bxx | Operations research and management science
| 500 | browse |
| 90Cxx | Mathematical programming
| 1027 | browse |
| 90Dxx | Game theory
| 7 | browse |