The reflected binary code, also known as Gray code after Frank Gray, is a binary numeral system where two successive values differ in only one bit. It is a non-weighted code.
The reflected binary code was originally designed to prevent spurious output from electromechanical switches. Today, Gray codes are widely used to facilitate error correction in digital communications such as digital terrestrial television and some cable TV systems.
Read more about Gray Code: Name, Motivation, History and Practical Application, Constructing An n-bit Gray Code, Converting To and From Gray Code, Special Types of Gray Codes
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—Philip MacDonald, and Robert Wise. Landlord, The Body Snatcher, directing Gray to the drunken Dr. MacFarland (1945)
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—Ellen Glasgow (1873–1945)