COBOL

Business application language designed at the behest of the USA Department of Defence in the 1950's.

A list of OS/2 implementations of COBOL

David Dill: The COBOL Presentation Manager Programming Guide: For OS/2 Versions 1.3 and 2.0 - 1992 - ISBN: 0442012934 - Out of print
Status Report of DETAB-X (Decision Table, Experimental) - 1963 - Of historical interest only

comp.lang.cobol - Still alive (mostly) - Go to the Google groups version if you are newsgroup challenged.
alt.cobol - By now a dead duck, however during the 90´s a better information resource on COBOL than the traditional comp.lang.cobol group, and since google has most posting of the group archived and searchable, it is a great information resource for those working with older COBOL tools.

COBOL-60 first formal standard
COBOL-61 published as "Cobol-1961: Report to Conference on Data Systems Languages (U.S. Department of Defence 1961). - This should be in the public domain as a DoD publication but for some reason is not. Not fully compatible with COBOL-60, but the basis for most COBOL compilers developed in the 1960's.
COBOL-61 EXTENDED An extension for COBOL-61 with syntax clarifications and so on, arithmetic extensions mean that the language is not 100% compatible with COBOL-61. First standard that offers the sort and report writer features, although the latter is optional.
COBOL-65