Measurement and test methods for tuning fork quartz crystal units in the range from 10 kHz to 200 kHz and standard values (Endorsed by AENOR in June of 2009.)
Edition 2009-06-01

Fibre optic active components and devices - Test and measurement procedures - Part 5: Wavelength channel tuning time of tuneable transmitters (Endorsed by Asociación Española de Normalización in September of 2017.)
Edition 2017-09-01

Two-Part High Density Blade and Backplane Tuning Fork Connector
Edition 1998-02

Acoustics; Standard tuning frequency (Standard musical pitch)
Edition 1975-01

Fibre optic active components and devices - Test and measurement procedures - Part 5: Wavelength channel tuning time of tuneable transmitters (IEC 62150-5:2017); German version EN 62150-5:2017
Edition 2018-04

Measurement and test methods for tuning fork quartz crystal units in the range from 10 kHz to 200 kHz and standard values (IEC 60689:2008); German version EN 60689:2009
Edition 2009-08

Measurement of the Electrical Properties of Microwave Tubes; Part 1: Terminologie
Edition 1978-09

MIDI (Musical Instrument Digital Interface) specification 1.0 (Abridged edition, 2015) (IEC 63035:2017); English version EN 63035:2017
Edition 2018-08