Boca Raton, Fla.--List marketer Worldata announced Monday it will manage two Ziff Davis Media files: the "C-Level Executives Masterfile" and the "Financial Executives Masterfile". The names in the two files are compiled from eWeek, Interactive Week, CIO Insight, PC Magazine, Baseline, ExtremeTech.com, Smart Partner
and other Ziff Davis Media
publication subscriber lists. The lists include postal as well as some e-mail data.