model | Model (person) | The Big Bang Theory | America's Next Top Model | Ford Model T | New Model Army | model (person) | Theory of a Deadman | Abstract art | music theory | Model United Nations | abstract art | probability theory | IPTC Information Interchange Model | theory | Theory of relativity | Lockheed Model 10 Electra | theory of relativity | Standard Model | Social learning theory | Model (profession) | Game Theory (band) | Game Theory | Elite Model Management | Conspiracy theory | Abstract Rude | The Bill James Historical Baseball Abstract | RGB color model | Music theory | Model Engineering College |
Three model-theoretic directions for universal logic have been explored to some depth: abstract model theory axiomatized by Jon Barwise, a topological / categorical approach based on sketches (sometimes called categorical model theory), and yet another categorical approach based on Goguen and Burstall's notion of institution.