Software
- Advanced Electronics Technology Associates, Inc. [AET, Inc.]
- AET, Inc.
- Agilent Technologies JAPAN, Ltd.
- AMT, Inc.
- Ansoft Japan K.K.
- Artech House, Inc. [AET, Inc.]
- AWR Japan K.K.
- Centellax, Inc. [PTM Corp.]
- CST - Computer Simulation Technology AG [AET, Inc.]
- EM Software & Systems [Farad Corp.]
- ETS-Lindgren Japan, Inc.
- Farad Corp.
- Fastrax Ltd., [M-RF Co., Ltd.]
- Fujitsu, Ltd.
- Ironcad L.L.C. [AMT, Inc.]
- Keisoku Engineering System Co., Ltd.
- Keycom Corp.
- Kozo Keikaku Engineering, Inc.
- Magus(Pty), Ltd, [Farad Corp.]
- MEL, Inc.
- MEL, Inc. [Netwell Corp.]
- MicroWave Factory Co., Ltd.
- Modelithics, Inc. [Netwell Corp.]
- Morita Tech Co., Ltd.
- M-RF Co., Ltd.
- National Instruments Japan Corp.
- Netwell Corp.
- ORBIT/FR Engineering Ltd. [Micro Wave Factory Co., Ltd.]
- PTM Corp.
- Sonnet Giken Co., Ltd.
- Sonnet Software, Inc. [Sonnet Giken Co., Ltd.]
- Suss Microtec K.K.
- TelePower, Inc. [PTM Corp.]
- Troicom, Inc. [PTM Corp.]
- WIPL-D (JAPAN), Inc.
- Zeland Software, Inc. [Farad Corp.]