| Subject | English | Russian |
| comp., MS | natural hierarchy | естественная иерархия (A hiearchy in which at every level there is a one-to-many relationship between members in that level and members in the next lower level) |
| ling. | natural topic hierarchy | референциальная иерархия |
| ling. | natural topic hierarchy | топикальная иерархия |
| ling. | natural topic hierarchy | иерархия естественного топика |