Maturity or immaturity may refer to:

Adulthood or age of majority Maturity model Capability Maturity Model, in software engineering, a model representing the degree of formality and optimization of processes in an organization Developmental age, the age of an embryo as measured from the point of fertilization Mature technology, a technology has been in use and development for long enough that most of its initial problems have been overcome Maturity (finance), indicating the final date for payment of principal and interest Maturity (geology), rock, source rock, and hydrocarbon generation Maturity (psychological), responding to the circumstances or environment in an appropriate manner Maturity (sedimentology), the proximity of a sedimentary deposit from its source Sexual maturity, the stage when an organism can reproduce, though this is distinct from adulthood

Source: Wikipedia

(F) Fuzzy exceptional problems