Louis Hart, Compunetics, asked for contacts for Polar Instruments who manufactures a PC/MS DOS based controlled impedance measurement system. In the US: Polar Instruments, Inc. 5373 Guide Meridan, Bldg Bellingham, WA 98226 Tel 1-800-328-0817 FAX 360-398-1946 Att'n Robert Bosley Home Office in the U.K. Polar Instruments, Ltd Garenne Park St. Sampsons Gurnsey GY2 4AF Channel Islands, U.K. Tel 011-44-1481-53081 FAX 011-44-1481-52476 E-mail: [log in to unmask] Att'n Andy Burkhardt