Date of update: 16 May 1995 List of ITU-T Series A Recommendations in force ** - Series A * Organization of the work of the ITU-T A.1 (1993) [Rev.1] [WTSC 93 Book 1] [Publ.: Sep.93] Presentation of contributions relative to the study of Questions assigned to the ITU-T A.10 (1993) [Rev.1] [WTSC 93 Book 1] [Publ.: Sep.93] Terms and definitions A.12 (1993) [Rev.1] [WTSC 93 Book 1] [Publ.: Sep.93] Collaboration with the International Electrotechnical commission on the subject of definitions for telecommunications A.13 (1993) [Rev.1] [WTSC 93 Book 1] [Publ.: Sep.93] Collaboration with the International Electrotechnical commission on graphical symbols and diagrams used in telecommunications A.14 (1993) [Rev.1] [WTSC 93 Book 1] [Publ.: Sep.93] Production maintenance and publication of ITU-T terminology A.15 (1993) [Rev.1] [WTSC 93 Book 1] [Publ.: Sep.93] Elaboration and presentation of texts for Recommendations of the ITU Telecommunication Standardization Sector A.20 (1993) [Rev.1] [WTSC 93 Book 1] [Publ.: Sep.93] Collaboration with other international organizations over data transmission A.21 (1993) [Rev.1] [WTSC 93 Book 1] [Publ.: Sep.93] Collaboration with other international organizations on ITU-T defined telematic services A.22 (1993) [Rev.1] [WTSC 93 Book 1] [Publ.: Sep.93] Collaboration with other international organizations on information technology A.23 (1993) [New] [WTSC 93 Book 1] [Publ.: Sep.93] Collaboration with other international organizations on information technology, telematic services and data transmission A.30 (1993) [Rev.1] [WTSC 93 Book 1] [Publ.: Sep.93] Major degradation or disruption of service Note - Same as F.12