(chemistry) A molecular model of a chemical substance, displaying the three-dimensional position of the atoms (as spheres) and the bonds between them (as connecting rods).

(historical, physics) An obsolete scientific model of the atom, devised shortly after the discovery of the electron but before the discovery of the atomic nucleus, and according to which the atom is composed of electrons surrounded by a soup of positive charge to balance the electrons' negative charges. It was disproved in 1909.

(machine learning) A type of neural network specialized in language.

(education) A simple tree-like diagram showing the relationship between a whole and its parts, used in teaching mathematical concepts such as fractions.

A model of microprocessor production in which each microarchitecture change is followed with a die shrink of the process technology.

An approach which extends hyperelastic material models to allow for the Mullins effect.

(economics) A model in development economics that explains the growth of a developing economy in terms of a labour transition between the capitalist sector and the subsistence sector.

(economics) A mathematical model for the dynamics of a financial market containing derivative investment instruments.

(economics) A microeconomic model of price-setting oligopoly, dealing with the situation of a homogeneous product (i.e. consumers want to buy from the cheapest seller) and a limit to the output of firms which are willing and able to sell at a particular price.

(psychology) A model of human desire which distinguishes sexual and romantic attraction.