- Panasonic Japan
- Perfectone Switzerland
- Fujinon Japan
- Photomec UK
- Pinnacle USA
- Quantegy USA
- Racal Instruments UK
- Sagem France
- SAIT Marine Belgium
- Seiko Instruments Japan
- Servo Corp. Of America USA
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- Solid State Logic UK
- Sony Japan
- ST Systron USA
- Stanford Research Systems (SRS), USA
- Studer International Switzerland
- Technovision Cameras UK
- Tescon Japan
- Uki Sangyo Japan
- W.Steenbeck & Co. Germany
- Weather Balloons Japan
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