RS-232
IP, UDP, TCP, SLIP
Internet 0

three-wire:
   light+button:
      i0.14.2.cad
   serial bridge:
      i0.15.2.cad
   hub:
      i0.16.cad
   byte:
      i0.14.byte.asm
      i0.15.byte.asm
      rx.py
      send.py
   packet:
      i0.14.packet.asm
      i0.15.packet.asm
      thtp.py

assignment:
   build a network
   pick a final project