1. A computer-implemented method of displaying computer documentation, the method comprising: (a) displaying in a first display region of a computer display at least a portion of a first navigation file including a plurality of API set links associated with a plurality of Application Programming Interface (API) sets; (b) displaying in a second display region of the computer display at least a portion of a second navigation file associated with a selected API set among the plurality of API sets, the second navigation file including a plurality of program entity links associated with a plurality of program entities in the selected API set; and (c) displaying in a third display region of the computer display at least a portion of an index file that includes a plurality of index links associated with documentation files for at least two API sets from the plurality of API sets.