IEC 81714-3:2004

Design of graphical symbols for use in the technical documentation of products - Part 3: Classification of connect nodes, networks and their encoding

IEC 60447:2004

Basic and safety principles for man-machine interface, marking and identification - Actuating principles

IEC 60073:2002

Basic and safety principles for man-machine interface, marking and identification - Coding principles for indicators and actuators

IEC 82045-1:2001

Document management - Part 1: Principles and methods