Code ch. 1 — Morse code as a first code: dots, dashes and timing, why common letters are short, and what a code actually is.
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#encoding
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Code ch. 3 — Braille's six-dot cells as a binary code, 64 combinations, and shift/escape codes that change what the next symbol means.
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Code ch. 13 — text as numbers: Baudot and shift codes, 7-bit ASCII and control characters, code pages, Unicode, and UTF-8/16/32.
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