Pearl River, N.Y.—Walter Karl, a division of Donnelley Marketing and infoUSA, has won management responsibilities for lists from Ziff Davis Media and Primedia Business Magazines & Media. The Ziff Davis postal and e-mail subscriber lists were previously managed by Worldata. The 22 million-plus names are derived from Ziff Davis’ portfolio of print publications, content Web sites and conferences. The Primedia files contains 3.2 million postal and e-mail addresses and phone numbers of subscribers. The lists were previously managed by Statlistics.