| KernSmooth | Functions for kernel smoothing for Wand & Jones (1995) |
| MASS | Main Package of Venables and Ripley's MASS |
| base | The R Base Package |
| boot | Bootstrap R (S-Plus) Functions (Canty) |
| class | Functions for Classification |
| cluster | Functions for clustering (by Rousseeuw et al.) |
| ctest | Defunct Package for Classical Tests |
| eda | Defunct Package for Exploratory Data Analysis |
| foreign | Read data stored by Minitab, S, SAS, SPSS, Stata, ... |
| graphics | The R Graphics Package |
| grid | The Grid Graphics Package |
| lattice | Lattice Graphics |
| lqs | Resistant Regression and Covariance Estimation |
| methods | Formal Methods and Classes |
| mgcv | Multiple smoothing parameter estimation and GAMs by GCV |
| mle | Defunct package for maximum likelihood estimation |
| modreg | Defunct Package for Modern Regression: Smoothing and Local Methods |
| mva | Defunct Package for Classical Multivariate Analysis |
| nlme | Linear and nonlinear mixed effects models |
| nls | Defunct Package for Nonlinear Regression |
| nnet | Feed-forward Neural Networks and Multinomial Log-Linear Models |
| rpart | Recursive Partitioning |
| spatial | Functions for Kriging and Point Pattern Analysis |
| splines | Regression Spline Functions and Classes |
| stats | The R Stats Package |
| stats4 | Statistical functions using S4 classes |
| stepfun | Defunct Package for Step Functions, incl. Empirical Distributions |
| survival | Survival analysis, including penalised likelihood. |
| tcltk | Tcl/Tk Interface |
| tools | Tools for Package Development |
| ts | Defunct Package of Time Series Functions |
| utils | The R Utils Package |