Every character a keyboard can produce — ASCII & Unicode foundations, Latin diacritics, Cyrillic, Greek, IPA, math & currency symbols, punctuation, arrows, CJK ideographs, Hangul, Arabic, Hebrew, Devanagari, emoji, combining marks, ligatures, old scripts (runes, hieroglyphs), Braille, Morse, NATO phonetic alphabet, mojibake & encoding fixes, Vietnamese tonal marks, Polish/Czech/Hungarian/Turkish letters, Esperanto hat letters, Romanization systems & Pinyin tones, Roman numerals, fractions, letterlike math symbols, card & chess suits, music notation, zodiac & planetary symbols, dingbats & Wingdings, whitespace & zero-width characters, emoji modifiers & flags, Unicode normalization, homoglyph spoofing, Punycode, HTML entities, kaomoji, ASCII art, Thai/Lao/Khmer/Burmese/Tibetan/Mongolian, all South & other Indic scripts, African scripts (Ge'ez, Tifinagh, Adlam, N'Ko), Indigenous syllabics, Coptic/Gothic/Glagolitic, CJK traditional vs simplified, Hangul Jamo, furigana & vertical writing, ANSI terminal escapes, regex character classes — and how to type them all (Alt codes, AltGr, Compose key, IMEs, layouts). 1140 lessons across 76 units.