An entity-relationship diagram; a specialized (usually dynamic) chart that illustrates the relationships between entities in a database, using a specific set of database-specific symbols.

A pictorial representation of a system or process in which subsystems or other components are represented by geometric shapes joined by lines or arrows

A diagram used in quality management to display a detailed list of causes and effects of a problem and thus to decipher the root cause of a problem.

(software engineering) A type of static structure diagram that describes the structure of a system by showing the system's classes, their attributes, and the relationships between the classes.

A diagram in the field of logic. / Any non-spatial, abstract diagram. / Any schematic display of the logical relationships of project activities.

(topology) A representation in the plane of a knot, with no triple points.

(set theory) A diagram which represents a finite poset, in which nodes are elements of the poset and arrows represent the order relation between elements. Transitivity of the order relation is tacit, in other words, if x<y and y<z then no arrow is drawn from x to z, but if there is no distinct z between x and y (such that x<z<y) then an arrow is draw from x to y.

An Ishikawa diagram.

(mathematics, somewhat informal) A proof in stages, each of which, in general, depends on the previous stages and can be visualized by means of a diagram of morphisms.

plural of diagram chase