Graphical symbols - Safety colours and safety signs - Part 3: Design principles for graphical symbols for use in safety signs (ISO 3864-3:2012)— 33 стр.
Letter symbols to be used in electrical technology - Part 1: General (IEC 60027-1:1995 (Reprint) + A1:1997 + A2:2005); German version EN 60027-1:2006 + A2:2007— 89 стр.
Letter symbols to be used in electrical technology - Part 2: Telecommunications and electronics (IEC 60027-2:2005); German version EN 60027-2:2007— 92 стр.