ARITH-MATIC
ARITH-MATIC is an extension of Grace Hopper's A-2 programming language, developed around 1955. ARITH-MATIC was originally known as A-3, but was renamed by the marketing department of Remington Rand UNIVAC.
Some ARITH-MATIC subroutines
| Type | Subroutine | Description | Explanation |
| Arithmetic | AAO | A+B=C | The A in the middle of 'AA0' stands for addition |
| Arithmetic | ASO | A-B=C | The S in the middle of 'AS0' stands for subtraction |
| Arithmetic | AMO | A*B=C | The M in the middle of 'AM0' stands for multiplication |
| Arithmetic | ADO | A/B=C | The D in the middle of 'AD0' stands for division |
| Trigonometric | TSOOOO | Sin=B | The S in the middle of 'TS0' stands for Sin |
| Trigonometric | TCOOOO | Cos=B | The C in the middle of 'TC0' stands for Cos |
| Trigonometric | TTOOOO | Tan=B | The T in the middle of 'TT0' stands for Tan |
| Trigonometric | TATOOO | Arctan=B | The AT stands for Arctan |
| Hyperbolic | HSOOOO | Sinh=B | The S in the middle of 'HS0' stands for Sin h |
| Hyperbolic | HCOOOO | Cosh=B | The C in the middle of 'TC0' stands for Cos h |
| Hyperbolic | HTOOOO | Tanh=B | The T in the middle of 'TT0' stands for Tan h |
| General Mathematical | SQROOO | Sqrt=B | |
| General Mathematical | APN | A**N=B | **: Exponentiation |