A sequence of complementary capabilities, functions, and services, each of which adds value to the previous, and all of which are required to serve the needs of users. For software, major ones include analysis, development, provisioning, and operations.
See price.
See versioning.
See release.
In economics, a form of price discrimination in which different versions of a product serving different price-quality-feature points are offered at distinct prices, and customers self-select based on their willingness to pay. In software, the term variant is used, because the term version has a different connotation (see distribution).
See portability.