16W60 Valuations, completions, formal power series and related constructions [See also <a href="#code:13Jxx">13Jxx</a>]

16W70 Filtered rings; filtrational and graded techniques

16W80 Topological and ordered rings and modules [See also <a href="#code:06F25">06F25</a>, <a href="#code:13Jxx">13Jxx</a>]

16W99 None of the above, but in this section

16Yxx Generalizations {For nonassociative rings, see <a href="#code:17-XX">17-XX</a>}

16Y30 Near-rings [See also <a href="#code:12K05">12K05</a>]

16Y60 Semirings [See also <a href="#code:12K10">12K10</a>]

16Y99 None of the above, but in this section

16Zxx Computational aspects of associative rings

16Z05 Computational aspects of associative rings [See also <a href="#code:68W30">68W30</a>]

16Z99 None of the above, but in this section

17-00 General reference works (handbooks, dictionaries, bibliographies, etc.)

17-01 Instructional exposition (textbooks, tutorial papers, etc.)

17-02 Research exposition (monographs, survey articles)

17-03 Historical (must also be assigned at least one classification number from Section 01)

17-04 Explicit machine computation and programs (not the theory of computation or programming)

17-06 Proceedings, conferences, collections, etc.

17A30 Algebras satisfying other identities

17A36 Automorphisms, derivations, other operators

17A42 Other $n$-ary compositions $(n \ge 3)$

17A45 Quadratic algebras (but not quadratic Jordan algebras)

17A99 None of the above, but in this section

17Bxx Lie algebras and Lie superalgebras {For Lie groups, see <a href="#code:22Exx">22Exx</a>}

17B01 Identities, free Lie (super)algebras

17B08 Coadjoint orbits; nilpotent varieties

17B10 Representations, algebraic theory (weights)

17B20 Simple, semisimple, reductive (super)algebras

17B35 Universal enveloping (super)algebras [See also <a href="#code:16S30">16S30</a>]

17B37 Quantum groups (quantized enveloping algebras) and related deformations [See also <a href="#code:16T20">16T20</a>, <a href="#code:20G42">20G42</a>, <a href="#code:81R50">81R50</a>, <a href="#code:82B23">82B23</a>]