Remember the good old days of DOS, when you could open command.com with a simple text editor and find the line with the dreaded "Abort, Retry, Fail" message.
Unwary users were so supprised to see "You're F!*%ed" or some such. And no ammount of rebooting would solve the problem.
The American Registry for Internet Numbers (ARIN) has sent out an alert saying its share of the dwindling IPv4 addresses is near rock bottom, so it is going to a stricter procedure for approving requests for those that are left.