| G01BKF | Poisson distribution function |
| G02GCF | Fits a generalized linear model with Poisson errors |
| G05TJF | Generates a vector of pseudorandom integers from a Poisson distribution |
| G05TKF | Generates a vector of pseudorandom integers from a Poisson distribution with varying mean |
| G07ABF | Computes confidence interval for the parameter of a Poisson distribution |