 Principia Mathematica [PM] by A.N. Whitehead and Bertrand Russell, published 1910–1913 in three volumes by Cambridge University Press, contains a derivation of large portions of mathematics using notions and principles of symbolic logic. The notation in that work has been superseded by the subsequent development of logic during the 20th century, to the extent that the beginner has trouble reading PM at all. This article provides an introduction to the symbolism of PM, showing how that symbolism can be translated into a more contemporary notation using concepts which should be familiar to anyone who has had a first course in symbolic logic or set theory. This translation is offered as an aid to learning the original notation, which itself is a subject of scholarly dispute, and embodies substantive logical doctrines so that it cannot simply be replaced by contemporary symbolism. Learning the notation, then, is a first step to learning the distinctive logical doctrines of Principia Mathematica. 