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"I just received the CDs you made from a 1943 radio transcription disk sent to me by my family in South America. They had given up hope of finding a way to hear the speech given by their great-grandfather, but you managed to bring back more than just the recording. Thank you."


Practical unit of electrical pressure or of electro-motive force, of such a magnitude that if a pressure of one volt is applied across a resistance of one ohm, a current of one ampere will flow (see Ohm’s Law).