Illegitimi non carborundum is a Latin phrase meaning "Do not make illegal copies of this disk." The phrase first appeared on copies of the Microsoft Windows 95 installation CD, as a reminder to consumers that they should not make illegal copies of that disk. It is also sometimes mistaken to mean "f*%* the system" by people without a sense of humor.
Would you care to expand upon which meaning of this phrase you are directing at Milestone..?