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other users The Radio Electronics Television Manufacturers'
Association was formed in 1953, as a result of mergers with
other trade standards organisations. It was principally
responsible for the standardised nomenclature Nomenclature is a
term that applies to either a list of names or terms, or to the
system of principles, procedures and terms related to naming -
which is the assigning of a word or phrase to a particular
object or property... for American vacuum tubes. American made
tubes bear a RETMA designation to allow for easy cross-
referencing. The RETMA tube designation does not incorporate the
purpose of each tube in the designation. The Anglo-European
Mullard-Philips tube designation In Europe, the principal method
of numbering vacuum tubes was the nomenclature developed and
used by Mullard in the UK and applied Europe-wide thanks to
their parentage by Philips who had subsidiaries