8500  General reference works (handbooks, dictionaries, bibliographies, etc.)


8501  Instructional exposition (textbooks, tutorial papers, etc.)


8502  Research exposition (monographs, survey articles)


8503  Historical (must also be assigned at least one classification number from Section 01)


8504  Explicit machine computation and programs (not the theory of computation or programming)


8505  Experimental work


8506  Proceedings, conferences, collections, etc.


8508  Computational methods



85A04  General


85A05  Galactic and stellar dynamics


85A15  Galactic and stellar structure


85A20  Planetary atmospheres


85A25  Radiative transfer


85A30  Hydrodynamic and hydromagnetic problems [See also 76Y05]


85A35  Statistical astronomy


85A40  Cosmology {For relativistic cosmology, see 83F05}


85A99  Miscellaneous topics

