EXHIBIT 21 QMS, INC. SUBSIDIARIES AND TRADE NAMES Unless indicated otherwise, each of the following is a wholly owned subsidiary of QMS, Inc. State or Other Jurisdiction of Other Names Under Which Legal Name of Subsidiary Incorporation Subsidiary Does Business - --------------------------- ---------------- ------------------------- QMS Circuits, Inc. Delaware QCI QMS Foreign Sales, Inc. U.S. Virgin Islands QMS Canada, Inc. Canada *QMS Japan, Inc. Japan QMS Asia-Pacific, Inc. Delaware As of December 20, 1995 * In the process of dissolution as of September 1995