An apparatus, program product and method effectively merge computer documentation for multiple API sets together to facilitate user access to such computer documentation. Such merging of computer documentation may include, in part, the incorporation, into a navigation file, of a plurality of API set links associated with a plurality of API sets, as well as the incorporation, into an index file, of a plurality of index links to documentation files for at least two of the plurality of API sets. Furthermore, computer documentation may be displayed to a user by displaying selected information in a plurality of display regions of a computer display. In a first display region, at least a portion of a first navigation file may be displayed, with the first navigation file including a plurality of API set links associated with a plurality of API sets. In a second display region, at least a portion of a second navigation file associated with a selected API set among the plurality of API sets may be displayed, with the second navigation file including a plurality of program entity links associated with a plurality of program entities in the selected API set. In a third display region, at least a portion of an index file may be displayed, with the index file including a plurality of index links associated with documentation files for at least two API sets from the plurality of API sets.