On Tue, Mar 10, 2020 at 9:02 AM Bob Hinden via Internet-history <internet-history at elists.isoc.org> wrote: [...] > I later did a TCP implementation for the TAC in H-316 assembly language. > Was lots of fun doing 32-bit segment calculations on a machine with 15-bit arithmetic. Do you know why the designers of the TAC chose 15-bit arithmetic for it? Thanks, Leo