In modem is adding 2 words of English .They modulation and demodulation.Modulation means to give Digital signals to Analog signals.Demodulation means to give Analog signals to Digital signal.
          The word moden is made by getting the friest 2 Leters in modulatoin (mo) and the 3 Letters in Demodulation (Dem).After it is made Modem.This machine is provide internet connection to Computer with the help of telephone.