| E01BAF | Interpolating functions, cubic spline interpolant, one variable |
| E02BAF | Least squares curve cubic spline fit (including interpolation) |
| E02BBF | Evaluation of fitted cubic spline, function only |
| E02BCF | Evaluation of fitted cubic spline, function and derivatives |
| E02BDF | Evaluation of fitted cubic spline, definite integral |
| E02DAF | Least squares surface fit, bicubic splines |