One Billion Knowledgeable

Tony Hoare made several observations on records in 1966, and he particularly put forth the concept of record subclasses, which are record types with shared features that are distinguished by a variant tag and have fields that are exclusive to the variant.

A class is an extendable program-code template used in object-oriented programming that offers starting settings for state (member variables) and behavior implementations (member functions or methods).

As a result, they can more easily simulate dynamic systems (such as the real world, machine learning, and AI).