Monad

Monad may refer to:

In philosophy:

Monad (symbol), a term used by ancient philosophers Pythagoras, Parmenides, Xenophanes, Plato, Aristotle, and Plotinus as a term for God or the first being, or the totality of all beings
Monad (Gnosticism), the most primal aspect of God in Gnosticism
Monism, the concept of "one essence" in the metaphysical and theological theory
Monadology, a book of philosophy by Gottfried Leibniz in which monads are a basic unit of perceptual reality
Monadologia Physica by Immanuel Kant
The Cup or Monad, a text in the Corpus Hermetica

In mathematics:

Monad (category theory), a type of functor in category theory
Monad (functional programming), type constructors that are used in functional programming languages to capture various notions of computation
Monadic predicate calculus is a form of logic based on unary operators

In music:

Monad (music), a single note, in contradistinction to a dyad, triad, tetrad, etc

In proper names and popular culture:

Monad (Technocracy), the symbol of Technocracy Incorporated and the Technocratic movement of North America
Windows PowerShell, a command line interface for Microsoft Windows code-named "Monad"
Xmonad, a window manager for the X Window System
John Monad, title character of the television series John from Cincinnati