PCM: Pulse code modulation. It is a method used to digitally represent sampled analog signals. It is the standard form of digital audio in computers, digital telephony and compact discs. The amplitude of this signal is sampled regularly at uniform intervals.
PAM: Pulse amplitude modulation. It is a form of signal modulation where the message information is encoded in the amplitude of a series of signal pulses.
In Pygmalion, we observe a society divided, separated by language, education, and wealth. Shaw gives us a chance to see how that gap can be bridged, both successfully and unsuccessfully. As he portrays it, London society cannot simply be defined by two terms, "rich" and "poor."
Within each group there are smaller less obvious distinctions, and it is in the middle, in that gray area between wealth and poverty that many of the most difficult questions arise and from which the most surprising truths emerge.
Some scientists look into outer space while others look elsewhere. Georg Steinhauser looked into his bellybutton and discovered what the lint found there contains and its possible purpose. Mostly made of fabric bits and dead skin, it is most likely used to keep germs and other things out.
