KR, Inc.
Science, Math, Logic and Foundations, Organizations - KR, Inc.. Principles of Knowledge Representation and Reasoning, Incorporated.
http://www.kr.org/
ASL
Science, Math, Logic and Foundations, Organizations - ASL. Association for Symbolic Logic.
https://www.aslonline.org/
CSHPM
Science, Math, Logic and Foundations, Organizations - CSHPM. Canadian Society for History and Philosophy of Mathematics.
https://www.cshpm.org/