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.
Liquid crystal display devices - Part 10-1: Environmental, endurance and mechanical test methods - Mechanical (IEC 61747-10-1:2013); German version EN 61747-10-1:2013— 14 стр.