Phone Key Pads

	ITU E.161	ITU
	http://www.itu.int/rec/recommendation.asp The official international standard on how to arrange letters on the touch tone phone key pad. (Also see the US standard ANSI T1.703)
	THE REAL SOURCE OF THE WORD 'OCTOTHORPE'	Ralph Carlsen, Adrian Kennard, and John Moynihan
	http://www.sigtel.com/tel_tech_octothorpe.html Why the # is also called an Octothorpe, plus a few other juicy tidbits.

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