| ! | Factorial | |
| “ | Second derivative | |
| # | Number | |
| % | Per Cent | |
| ( ] | Half Open Set on the Left | |
| () | Open Set | |
| * | Multiplication | |
| – | Subtraction | |
| – | Negative | |
| -1′ | Minus One Dash | |
| / | Division | |
| 00110 | The binary representation for the number 6 | |
| 121 | One-to-One correspondence | |
| 1DP | 1 Decimal Place | |
| 1e+9 | 1000000000 | |
| 1E1 | An Hexadecimal number equals to 481 in Decimal | |
| 1E6 | 1,000,000 | |
| 1E9 | 1,000,000,000 (a billion) | |
| 1NF | First Normal Form | |
| 250K | Two Hundred Fifty Thousand | |
| 2D | Two Dimensional | |
| 2DFT | Two-Dimensional Fourier Transform | |
| 2DP | Two Decimal Places | |
| 2DTF | Two-Dimensional Transfer Function | |
| 2NF | Second Normal Form | |
