Abstract: A LISP-based library of files of selected functionalities are preprocessed into Context files of machine-readable codes as the smallest usable modules of massive computer programs for distribution to users and for independent operation on a computer as each such functionality is required by a user. Such Context files are initially prepared after assuring that each Context file which relies on the contents of any other Context file is rendered independent by copying the dependent material into the Context file for storage and distribution therewith. At run time, each Context file is loaded into a memory segment of a computer only as needed in response to selection by a user, and as loaded into the computer for execution, clashes among names or keys associated with each newly-requested functionality in a session are resolved against the keys or names of the Context files already in memory segments of the computer.