A client-server interactive television program guide system is provided. An interactive
television program guide client is implemented on user television equipment. The
interactive television program guide provides users with an opportunity to define
expressions that are processed by the program guide server. The program guide server
may provide program guide data, schedules reminders, schedules program recordings,
and parentally locks programs based on the expressions. Users' viewing histories
may be tracked. The program guide server may analyze the viewing histories and
generates viewing recommendations, targets advertising, and collects program ratings
information based on the viewing histories.
