| a02dhc | Complex exponential |
| g01dhc | Ranks, Normal scores, approximate Normal scores or exponential (Savage) scores |
| g05dbc | Pseudo-random real numbers, (negative) exponential distribution |
| g05ljc | Generates a vector of random numbers from an exponential distribution, seeds and generator number passed explicitly |
| g05lqc | Generates a vector of random numbers from an exponential mixture distribution, seeds and generator number passed explicitly |
| s13aac | Exponential integral E1 (x) |