Summary: Translucent Sums: A Foundation for
Higher-Order Module Systems
School of Computer Science
Carnegie Mellon University
Pittsburgh, PA 15213
Submitted in partial ful llment of the requirements
for the degree of Doctor of Philosophy.
Robert Harper, Chair
Luca Cardelli, DEC SRC
Copyright c 1997 Mark Lillibridge
This research was sponsored by the Air Force Materiel Command (AFMC) and the Defense Ad-
vanced Research Projects Agency (DARPA) under contract number, F19628-95-C-0050. The U.S. Gov-
ernment is authorized to reproduce and distribute reprints for Government purposes notwithstanding
any copyright notation thereon.