UIM - Unique Identification Mark - Application standard for very small items using matrix symbols
Edition 2021-02

Printed boards - Part 4: Rigid multilayer printed boards with interlayer connections; sectional specification; section 1: Capability detail specification; performance levels A, B and C (IEC 62326-4-1:1996); German version EN 62326-4-1:1997
Edition 1997-08

Distribution automation using distribution line carrier systems - Part 4: Data communication protocols; Section 41: Application protocols; Distribution line message specification (IEC 61334-4-41:1996); German version EN 61334-4-41:1996
Edition 1997-09