Mon Sep 12 11:28:34 2005

fixed understanding of fork:
  - parent gets PID of child
  - child gets 0

demo'ed "execl"
  - replaces process image w/that of newly launched process
  - PID stays the same

looked at how the scheduler might slice betw parent and child

showed unnamed pipe, with demo from web site:
  - child writes
  - parent reads, blocking until the child does its part