The origin of the term "actuary” hasn’t been discovered exactly, but there is a consideration, that it has initiated from the latin word "actuaries” which means a man who registers. To understand the meaning of this word let’s see what knowledge should an actuary have in percentages. An actuary should have mathematical knowledge (probability theory, statistics, actuarial and financial mathematics, econometrics) - 50%, knowledge of law - 25%, Actuaries do very variable kinds of work. It can be financial risks estimation, computation of case occurring probabilities, insurance benefits and premiums, pensions, annuities and other quantities.