Notes

sigExample.c     signal
sigAck.c         signal

gettimeofday.c   time of day

getitimer.c      just set and read the timer
getitimerV.c     just set and read the virtual timer

itimer.c       Using interrupts to count time.
itimerV.c      ...doesn't interrupt, give explanation).

fibtime.c      Using interrupts, count real time
fibtimeV.c     Using interrupts, count virtual time