Entropy (disambiguation)

Additional relevant articles may be found in the following categories:

• Thermodynamic entropy
• Entropy and information
• Quantum mechanical entropy

Entropy, in thermodynamics, is a measure of the energy in a thermodynamic system not available to do useful work.

Entropy may also refer to:

Thermodynamics

• Entropy (classical thermodynamics), the macroscopic approach to thermodynamic entropy
  • Entropy (energy dispersal), a variant perspective on thermodynamic entropy
• Entropy (statistical thermodynamics), the microscopic approach to thermodynamic entropy
• Gibbs entropy, statistical entropy of a thermodynamic system
  • Boltzmann entropy, an approximation to Gibbs entropy
  • Tsallis entropy, a generalization of Boltzmann-Gibbs entropy
• von Neumann entropy, entropy of a quantum-mechanical system
• Entropy (order and disorder), entropy's association with the amount of order, disorder, and/or chaos in a thermodynamic system
• History of entropy, concept of entropy that functional energy released from combustion reactions is always lost to dissipation or friction
• Introduction to entropy
• Entropy and life, research concerning the relationship between the thermodynamic quantity entropy and the evolution of life
• Entropy (astrophysics), the adiabatic constant

Information theory and mathematics

• Entropy (information theory), a measure of the amount of information contained in a message
• Entropy encoding, data compression strategies to produce a code length equal to the entropy of a message
• Kolmogorov–Sinai entropy, the rate of information generation by a measure-preserving dynamical system
• Rényi entropy, a family of diversity measures used to define fractal dimensions
• Topological entropy, a measure of exponential growth in the number of distinguishable orbits of a dynamical system
• Volume entropy, a Riemannian invariant measuring the exponential rate of volume growth of a Riemannian metric

Computer science

• Entropy (computing), a discussion of entropy generation and API's in computer systems
• Entropy (package manager), a Sabayon Linux package manager
• Entropy (anonymous data store), a discontinued project to build a computer network designed to be resistant to censorship

Music

• Entropy (album), an album by Anathallo and Javelins
• Entropy / Send Them, a hip-hop suite by DJ Shadow and the Groove Robbers
• "Entropy", a song by Bad Religion from Against the Grain
• "Entropy", a song by VNV Nation from Matter + Form
• "Entropy", a song by Moxy Früvous from The 'b' Album
• "Entropy", a song by MC Hawking

Other uses

• Entropy (anesthesiology), a measure of a patient's cortical function
• Entropy (ecology), a measure of biodiversity in the study of biological ecology
• Social entropy, a measure of the natural decay within a social system
• Entropy (board game)
• "Entropy" (Buffy episode)
• Entropy (film), a 1999 film by Phil Joanou
• Entropy: A New World View, a book by Jeremy Rifkin and Ted Howard
• "Entropy", a 1960 short story by Thomas Pynchon
• "Entropy", a 1995 short story by Leanne Frahm