The Encyclopaedia of the Philosophical Sciences (abbreviated as EPS or simply Encyclopaedia; German: Enzyklopädie der philosophischen Wissenschaften im Grundrisse, EPW, translated as Encyclopedia of the Philosophical Sciences in Basic Outline) by Georg Wilhelm Friedrich Hegel (first published in 1817, second edition 1827, third edition 1830), is a work that presents an abbreviated version of Hegel's systematic philosophy in its entirety, and is the only form in which Hegel ever published his entire mature philosophical system. The fact that the account is exhaustive, that the grounding structures of reality are ideal, and that the system is closed makes the Encyclopedia a statement par excellence of absolute idealism.