Sosyal Bilimler - Fen - Teknoloji
| Türkçe | İngilizce |
| Optoelektronik aletler | | Optoelectronic devices | |
| Oracle (Bilgisayar kütüğü) | | Oracle (Computer file) | |
| Oran (Sanat) | | Proportion (Art) | |
| Oran analizi | | Ratio analysis | |
| Ordular | | Armies | |
| Org (Müzik aleti) | | Organ (Musical instrument) | |
| Organ ve doku vericisi | | Donation of organs, tissues, etc. | |
| Organ, doku, vb. nakli | | Transplantation of organs, tissues, etc. | |
| Organeller | | Organelles | |
| Organik asitler | | Organic acids | |
| Organik bazlar | | Organic bases | |
| Organik bileşikler | | Organic compounds | |
| Organik çözücüler | | Organic solvents | |
| Organik elektrokimya | | Organic electrochemistry | |
| Organik gübreler | | Organic fertilizers | |
| Organik iletkenler | | Organic conductors | |
| Organik ince filmler | | Organic thin films | |
| Organik jeokimya | | Organic geochemistry | |
| Organik kimya bkz. Kimya, Organik | | Organic chemistry see Chemistry, Organic | |
| Organik mimari | | Organic architecture | |
