Phenomena of interfaces (a shared boundary between two functional units, defined by various characteristics pertaining to the functions, physical interconnections, signal exchanges, and other characteristics, as appropriate). (Adapted from ISO/IEC 2382-1:1993(en) Information technology — Vocabulary — Part 1: Fundamental terms. https://www.iso.org/obp/ui/#iso:std:iso-iec:2382:-1:ed-3:v1:en)
