From: AAAI Technical Report FS-95-02. Compilation copyright © 1995, AAAI (www.aaai.org). All rights reserved. Varieties of Formalized Contexts and Subcontexts John McCarthy Stanford University Wecan consider several kinds of subcontexts and discuss their relations with the enveloping context. These include theories and their lifting to outer contexts as discussed in [1]. Also there are contexts of initial segments and other parts of a sentence that give the referents of nouns, pronounsand other parts of speech. Next we have problem solving contexts which are created to formalize problems, e.g. the Amarelcontext for missionaries and cannibals. Finally, wewill discuss database contexts that relate the contents of different databases as in [2]. References [1]John McCarthy. Notes on formalizing context. In Proceedings of the Thirteenth International Joint Conference on Artificial Intelligence, 1993. [2]John McCarthy and Sa~a BuvaS. Formalizing Context (Expanded Notes). Technical Note STAN-CS-TN-94-13,Stanford University, 1994.