Quick answer
General-purpose reference symbols that don't belong to a narrower category — degree, micro, ohm, number, per mille, angstrom, dagger, and prime — most of which do sit in the Latin-1 legacy range.
01 Alt codes at a glance
| Character | Windows Alt code | Universal (any codepoint) | Mac | HTML |
|---|---|---|---|---|
| Number Sign | — none — | Alt+X after typing 0023 (Word) · Ctrl+Shift+U then 0023 (Linux) |
Character page → | |
| Per Mille Sign | Alt+0137 |
Alt+X after typing 2030 (Word) · Ctrl+Shift+U then 2030 (Linux) |
Character page → | |
| Dagger | Alt+0134 |
Alt+X after typing 2020 (Word) · Ctrl+Shift+U then 2020 (Linux) |
Character page → | |
| Prime | — none — | Alt+X after typing 2032 (Word) · Ctrl+Shift+U then 2032 (Linux) |
Character page → | |
| Double Prime | — none — | Alt+X after typing 2033 (Word) · Ctrl+Shift+U then 2033 (Linux) |
Character page → | |
| Degree Sign | Alt+0176 |
Alt+X after typing 00B0 (Word) · Ctrl+Shift+U then 00b0 (Linux) |
Character page → | |
| Angstrom Sign | — none — | Alt+X after typing 212B (Word) · Ctrl+Shift+U then 212b (Linux) |
Character page → | |
| Micro Sign | Alt+0181 |
Alt+X after typing 00B5 (Word) · Ctrl+Shift+U then 00b5 (Linux) |
Character page → | |
| Ohm Sign | — none — | Alt+X after typing 2126 (Word) · Ctrl+Shift+U then 2126 (Linux) |
Character page → |
4 of 9 characters here have a legacy Windows Alt+NNNN code — that code only exists for the Latin-1 Supplement range and Windows-1252's fixed special-character block, not for Unicode generally. Every character has the universal hex-based method though: type the hex codepoint, then press Alt+X in Word to convert it.
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