PennWell (R) Corporation, founded in 1910 and based in Tulsa, Oklahoma, is a privately held firm that publishes business-to-business (B2B) content. The company provides readers with print and online publications. The company publishes books, maps, directories, and videos. It also produces 60 conferences and exhibitions annually. PennWell operates online exchanges. It provides customers with mailing list services. PennWell publishes 45 B2B magazines and newsletters. The firm originally was known for 'Oil & Gas Journal.' The company also publishes content targeted to readers across the electric power generation and delivery, water treatment, electronics, semiconductor, optoelectronics, communications, computer graphics, security, machine vision, renewable energy and fuel, emergency management services, and defense sectors. PennWell publishes content in multiple languages. The firm maintains additional publishing operations in the United States, Europe, and Asia. The company also has formed content licensing and conference production alliances with publishers worldwide. PennWell's Affinity publishing division provides corporations with customized publishing services. The unit produces magazines, advertising supplements, websites, packaging collateral, and e-mail marketing campaigns. PennWell's PennEnergy business provides organizations across the oil, gas, and electric power industries with online transaction services.