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| PennWell Corporation / pennNET | |
| Printed Circuit Fabrication | ||
| Circuits Assembly | ||
| CMP Media | ||
| SMT (Surface Mount Technology) | ||
| CircuiTree | ||
| Business News Publishing BNP | ||
| CMP Media | ||
| U.S. Tech | ||
| Soldering & Surface Mount Technology | ||
| EP&P Electronic Packaging & Production | ||
| OpenSystems Publishing | ||
| U.S. Tech | ||
| CMP Media | ||
| CompactPCI Systems | ||
| Reed Business Information (Cahners) - - - | ||
| Printed Circuit Design | ||
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