This one works for mac users and linux / other unix users, but not for people trapped in microsoft hell.
Open a terminal and type: uname -a
Then type: history | awk '{a[$2]++}END{for(i in a){print a[i] " " i}}' | sort -rn | head
Then paste the results:
darc-laptop:~ celesteh$ uname -a
(
Read more... )