| Subject | English | Japanese |
| comp., MS | base class | 基底クラス (A class from which other classes are derived by inheritance) |
| comp., MS | base class | 基本クラス (A class that assumes a parent role when it participates in an inheritance relationship with another class) |
| comp., MS | base class library | 基本クラス ライブラリ (A library that contains base classes) |