| Computer Graphics / Graphic Arts |
| | Electronic Publishing | http://ep.pennnet.com | About |
| Contamination Control |
| | CleanRooms | http://www.cleanrooms.com | About |
| | PennTechJOBS | http://www.penntechjobs.com | About |
| Defense / Security |
| | Military & Aerospace Electronics | http://mae.pennnet.com | About |
| | PennTechJOBS | http://www.penntechjobs.com | About |
| Dental |
| | Dental Economics | http://www.dentaleconomics.com | About |
| | Dental Office | http://www.dentalofficemag.com | About |
| | Proofs | http://www.proofs.com | About |
| | RDH | http://www.rdhmag.com | About |
| | Woman Dentist Journal | http://www.wdjournal.com | About |
| | Grand Rounds in Oral-Systemic Medicine | http://www.thesystemiclink.com | About |
| | INeedCE-Dental Continuing Education Courses | http://www.ineedce.com | About |
| | Pennwell Dental Group | http://www.pennwelldentalgroup.com | About |
| Electric Power Delivery |
| | Electric Light & Power | http://elp.pennnet.com | About |
| | Utility Automation & Engineering T&D | http://ua.pennnet.com | About |
| | Utility Products | http://www.utilityproducts.com | About |
| | PennEnergyJOBS | http://www.pennenergyjobs.com | About |
| Electric Power Generation |
| | Power Engineering | http://www.power-eng.com | About |
| | Power Engineering International | http://pei.pennnet.com | About |
| | Potencia | http://pepei.pennnet.com | About |
| | PennEnergyJOBS | http://www.pennenergyjobs.com | About |
| | Cogeneration and On-Site Power Production | http://www.cospp.com | About |
| | Renewable Energy World | http://www.renewable-energy-world.com | About |
| Electronics / Semiconductors |
| | Solid State Technology | http://sst.pennnet.com | About |
| | WaferNews | http://www.wafernews.com | About |
| | SMT | http://smt.pennnet.com | About |
| | Advanced Packaging | http://ap.pennnet.com | About |
| | Connector Specifier | http://cs.pennnet.com | About |
| | Microlithography World | http://www.microlithographyworld.com | About |
| | Small Times | http://www.smalltimes.com | About |
| | Military & Aerospace Electronics | http://mae.pennnet.com | About |
| | PennTechJOBS | http://www.penntechjobs.com | About |
| Enterprise Storage |
| | InfoStor | http://www.infostor.com | About |
| | InfoStor Europe | http://is.pennnet.com | About |
| | PennTechJOBS | http://www.penntechjobs.com | About |
| Fiber Optics / Communications |
| | Lightwave | http://lw.pennnet.com | About |
| | Lightwave Europe | http://lwe.pennnet.com | About |
| | Cabling Installation & Maintenance | http://cim.pennnet.com | About |
| | PennTechJOBS | http://www.penntechjobs.com | About |
| Fire / EMS |
| | Fire Engineering | http://www.fireengineering.com | About |
| Imaging/Machine Vision |
| | Vision Systems Design | http://www.vision-systems.com | About |
| | PennTechJOBS | http://www.penntechjobs.com | About |
| Oil & Gas |
| | Oil & Gas Journal | http://www.ogj.com | About |
| | Offshore | http://www.offshore-mag.com | About |
| | Oil, Gas & Petrochem Equipment | http://www.ogpe.com | About |
| | Oil & Gas Journal Latinoamericana | http://www.ogjonline.com | About |
| | Oil & Gas Financial Journal | http://www.ogfj.com | About |
| | PennEnergyJOBS | http://www.pennenergyjobs.com | About |
| | PennWell Petroleum Group | http://www.pennenergy.com | About |
| Optoelectronics / Photonics |
| | Laser Focus World | http://www.laserfocusworld.com | About |
| | Laser Focus World Buyers Guide: Optoelectronics Industry Sourcebook | http://laserfocusworld.365media.com | |
| | Industrial Laser Solutions | http://www.industrial-lasers.com | About |
| | PennTechJOBS | http://www.penntechjobs.com | About |
| Renewable Energy & Fuels |
| | Renewable Energy World | http://www.renewable-energy-world.com | About |
| Solid Waste |
| | Waste Management World | http://www.waste-management-world.com | About |
| Water/Wastewater |
| | WaterWorld | http://www.waterworld.com | About |
| | Industrial WaterWorld | http://www.waterworld.com | About |
| | Water & Wastewater International | http://www.wwinternational.com | About |
| | Waste Management World | http://www.waste-management-world.com | About |
| PennEnergy |
| | OGJ Exchange | http://www.ogjexchange.com | About |
| | Global Equipment Exchange | http://equipment.pennenergy.com/ | About |
| Market Research, Maps & Databases |
| | MAPSearch | http://www.mapsearch.com | About |
| | Strategies Unlimited | http://www.strategies-u.com | About |
| | Online Research Center | http://www.ogjresearch.com | About |
| Courage and Valor Foundation |
| | Courage and Valor Foundation | http://www.courageandvalor.com | About |
