This module explains the existing relevant standards and regulation for medical devices' industry and enlightens the revision of ISO 13485. It also presents some important terminologies with related definitions as defined by ISO 13485; which are arranged in separate groups. It also covers the comparison of ISO 13485 to FDA 21 CFR Part 820. All mandatory documents required by different clauses of the ISO 13485:2016 standard are also enumerated in this module along with its given clause reference.