| Subject | English | Arabic |
| econ. | concept of a public service | مفهوم الخدمة العامة |
| econ. | concept of elasticity | مفهوم المرونة (نظرية المرونة) |
| environ. | concept of environment The development at any level of a general notion of the surrounding ecosystem, its foundational relationship to human life and the need to preserve its integrity | مفهوم البيئة |
| econ. | concept of public service | مفهوم الخدمة العامة |
| comp., MS | proof of concept | إثبات المبدأ (The verification that the selected technology performs according to pre-established criteria in a lab environment designed to simulate the production environment) |
| gen. | proof of concept | إثبات صحة المفهوم وجدواه |
| gen. | proof of concept | إثبات صحة الفكرة |
| gen. | proof-of-concept | إثبات صحة المفهوم وجدواه |
| gen. | proof-of-concept | إثبات صحة الفكرة |