From The Wall Street Journal:
The Computer & Communications Industry Association has pursued Big Blue for decades in an effort to rein in the technology giant’s allegedly unfair behavior.
The CCIA now has added encouragement from a tiny firm backed by IBM rival Microsoft Corp., which has lodged an antitrust complaint in Europe, while pressing a related lawsuit in federal court in New York and sounding out U.S. regulators. T3 Technologies Inc. argues that IBM unfairly has sewn up the market for mainframes, the powerful machines relied upon by virtually every Fortune 500 company to crunch data.
The CCIA is also responsible for promoting antitrust action against Intel for trying to push AMD out of the x86 server market.
You can read more about CCIA’s position on the mainframe here.