Recommendation ITU-T X.1400 contains a baseline set of terms and definitions for distributed ledger technology (DLT). The definitions provide a basic characterization of the term, and where appropriate, a note is included to provide additional clarity. Recommendation ITU-T X.1400 (10/2020) was based on Focus Group Technical Report ITU-T FG DLT D1.1:2019, FG DLT D1.1 Distributed ledger technology terms and definitions.