Technology for Energy Corporation (TEC) designs and manufactures diagnostic instruments for four diverse industries. These industries are represented by TEC's four divisions: Aviation, also known as ACES Systems; Materials Testing; Nuclear Power; and Electric Power, or Powermetrix. TEC's ISO 9001 certification includes: Aviation Products, Materials Testing Products and Services, and Nuclear Products. In 1984, TEC began designing and manufacturing residual stress analysis systems--instruments that use x-ray diffraction to analyze the surface of metal and ceramic components for stresses that occur during manufacturing, reworking or operation of the part. The nondestructive x-ray diffraction (XRD) technique also can identify the amount of retained austenite in steels. This division--called the TEC Materials Testing Division--offers XRD systems and A2LA-accredited laboratory services that meet the requirements of ISO/IEC 17025.