Andrew Richard Koenig (IPA: [ˈkøːnɪç]; born June 1952) is a former AT&T and Bell Labs researcher and programmer. He is the author of C Traps and Pitfalls and co-author (with Barbara Moo) of Accelerated C++ and Ruminations on C++, and his name is associated with argument-dependent name lookup, also known as "Koenig lookup", though he is not its inventor. He served as the Project Editor of the ISO/ANSI standards committee for C++, and has authored over 150 papers on C++.