Table 1: Standards organizations affecting C++

U.S. Standards
ANSI The American National Standards Institute
X3 The ANSI committee for Information Processing Systems
ITI The Information Technology Industry Council. (I don't know why it isn't ITIC), formerly CBEMA (the Computer and Business Equipment Manufacturers Association) a trade association that funds the X3 secretariat.
X3J16 The X3 technical committee standardizing C++
International Standards
ISO The International Standards Organization, an organization of National Standards bodies
IEC The International Electrochemical Commision
JTC1 The Joint Technical Committee of ISO and IEC on Information Technology
SC12 The JTC1 sub-committee for programming languages
WG21 The SC22 Working Group for C++