| MSC 1991 | Number of Preprints | |
| 83-XX | Relativity and gravitational theory
| - | |
| 83-00 | General reference works (handbooks, dictionaries, bibliographies, etc.)
| - | |
| 83-01 | Instructional exposition (textbooks, tutorial papers, etc.)
| - | |
| 83-02 | Research exposition (monographs, survey articles)
| - | |
| 83-03 | Historical
| - | |
| 83-04 | Explicit machine computation and programs (not the theory of computation or programming)
| - | |
| 83-05 | Experimental papers
| - | |
| 83-06 | Proceedings, conferences, collections, etc.
| - | |
| 83-08 | Computational methods
| - | |
| 83A05 | Special relativity
| 2 | browse |
| 83B05 | Observational and experimental questions
| - | |
| 83Cxx | General relativity
| 64 | browse |
| 83D05 | Relativistic gravitational theories other than Einstein's, including asymmetric field theories
| 6 | browse |
| 83Exx | Unified, higher-dimensional and super field theories
| 34 | browse |
| 83F05 | Cosmology
| 9 | browse |