Identically adopts ISO/IEC 20546:2019, which provides a set of terms and definitions needed to promote improved communication and understanding of this area. It provides a terminological foundation for big data-related standards. This document provides a conceptual overview of the field of big data, its relationship to other technical areas and standards efforts, and the concepts ascribed to big data that are not new to big data. KEYWORDS: Big Data; Terminological foundation.