An interactive television program guide system is provided in which an interactive
television program guide is implemented on user television equipment containing
a memory. The system allocates the memory among different categories of program
guide data used by the program guide. When new channels are added to the channel
line-up, the program guide adjusts its memory allocation accordingly. When it is
desired to install a new non-program-guide application on the user television equipment
in addition to the program guide, memory can be reallocated to accommodate the
new application.
