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1. The name of the number system in which there are only zeros and ones. This is important to computers because all computer data is ultimately a series of zeros and ones, and thus can be represented by binary numbers.2. Data that is not meant to be intepreted through a common character set (like this page you can look up ASCII characters and descriptions.">ASCII). Pure binary data is typically 8-bit data. Transferring a binary file through ASCII channels without prior modification will result in corruption and loss of data. Binary data can be turned into ASCII data via uucoding or bcoding.