| Subject | English | Russian |
| ed. | certificate of study | справка об обучении (At the end of the course, the institution will provide you with a certificate of study confirming that you completed the required number of hours – Official site of the Government of Québec Tamerlane) |
| product. | certificate of study | документ об обучении (Yeldar Azanbayev) |
| ed. | certificate of study period | справка о периоде обучения (edu.pl Spring_beauty) |
| ed. | certificate of study time | справка о периоде обучения (uni-kassel.de Spring_beauty) |
| avia., corp.gov. | study group on certificates of airworthiness multilateral agreement | исследовательская группа по многостороннему соглашению о пригодности к полётам |