| Computation | Contains main evaluation and substitution methods to work with math expressions. |
| ComputationRuleException | |
| Decision | Obsolete. |
| Elements | Allows to handle most often used operations with el() function. |
| EvaluationContext | Context of the worksheet evaluation process. |
| Store | Evaluation context. Data type that stores all information about variables, arguments and functions definitions. Definitions represented in a stack. |
| IPluginLowLevelEvaluation | Interface to handle low-level evaluation. |
| IPluginLowLevelEvaluationFast | Interface to handle low-level evaluation. |