The guys at HardwareHell talk about file compresssion, and what exactly happens when you use it.  If you’re curious about what you use Huffman coding for, give it a read.
“Modern compression is the technology used today by computers in order to pass data from place to place using less data then it would take to simply transfer these data as they are. Compression is quite common these days and is used transparently in many computer systems. A simple example for using compression is the web, in which every time we view an image, we in fact decompress it.”

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