ALT Codes
This is a collection of alt-codes I've found useful for scientific writing. You can type these by holding down Alt and typing the number using the number pad (different from the normal top-line number keys). The html equivalent is also given.
| ALT Code | HTML Code | Symbol | Description |
| 247 | ≈ | ≈ | Approximately equal to |
| 240 | ≡ | ≡ | Identical to |
| 8800 | ≠ | ≠ | Not equal to |
| 241 | ± | ± | Plus or minus |
| 227 | π | π | Pi |
| 248 | ° | ° | Degree symbol |
| 236 | ∞ | ∞ | Infinity |
| 230 | µ | µ | Micro (10^-6) |
| 228 | Σ | Σ |
Sigma (Summutation) |
| 234 | Ω | Ω | Omega (Ohms) |
| 127 | ? | ? | Delta |
