11.9. Number of Processes
ps ax | wc -l | tr -d " " OR 
ps ax | wc -l | awk '{print $1}' OR ps ax | wc -l | sed -e "s: ::g".  In
each case, tr or awk or 
sed is used to remove the undesirable whitespace.
Relative speed: any one of these variants takes about 0.9 seconds on an
unloaded 486SX25.