Industrial communication networks - High availability automation networks - Part 4: Cross-network Redundancy Protocol (CRP) (IEC 62439-4:2010/A1:2012); English version EN 62439-4:2010/A1:2012
Edition 2013-06

Communication systems for meters - Part 4: Wireless M-Bus communication; English version EN 13757-4:2019
Edition 2019-09

Communication systems for meters - Part 4: Wireless M-Bus communication; German and English version prEN 13757-4:2024
Edition 2024-09

Electromagnetic compatibility and Radio spectrum Matters (ERM) - Enhanced Radio MEssage System (ERMES) - Part 4: Air interface specification; English version ETS 300133-4:1997
Edition 1998-12

Integrated Services Digital Network (ISDN) - Digital Subscriber Signalling System No. one (DSS1) protocol - Signalling network layer for circuit-mode basic call control - Part 4: Test Suite Structure and Test Purposes (TSS&TP) specification for the user; English version ETS 300403-4:1997
Edition 1997-11

Basic principles for graphical symbols for use on equipment - Part 4: Guidelines for the adaptation of graphical symbols for use on screens and displays (icons) (ISO 80416-4:2005)
Edition 2008-12

Industrial communication networks - High availability automation networks - Part 4: Cross-network Redundancy Protocol (CRP) (IEC 62439-4:2010); English version EN 62439-4:2010
Edition 2010-09

Aerospace series - General recommendation for the BIT Architecture in an integrated system; German and English version EN 9721:2021
Edition 2022-09

Radio Equipment and Systems (RES) - Land mobile service - Binary Interchange of Information and Signalling at 1200 bit/s (BIIS 1200); English version ETS 300230:1996
Edition 1998-06

Space - Use of GNSS-based positioning for road Intelligent Transport Systems (ITS) - Part 4: Definitions and system engineering procedures for the design and validation of test scenarios; German and English version prEN 16803-4:2023
Edition 2023-10