| Subject | English | Bulgarian |
| construct. | f.o.b. constructional project price | франко строителен обект цена |
| construct. | f.o.b. station of departure price | франко товарна гара цена |
| construct. | f.o.b. station of destination price | франко разтоварна гара цена |
| bot. | four-o'clock plant | вечерница |
| bot. | four-o'clock plant | сифа |
| transp., energ.ind. | H2-O2 cell | горивна клетка с протонно обменна мембрана |
| transp., energ.ind. | H2-O2 cell | горивен елемент с протонно обменна мембрана |
| comp., MS | I/O | В/И (The complementary tasks of gathering and distributing data. Input is data that is acquired from a device or entered by the user through a device. Output is data that is sent to a device) |
| IT | I/O expansion slot | разширителен слот |
| comp., MS | I/O port | В/И порт (A channel through which data is transferred between a device and the microprocessor. The port appears to the microprocessor as one or more memory addresses that it can use to send or receive data) |
| comp., MS | I/O request packet | В/И пакет (Data structures that drivers use to communicate with each other) |
| comp., MS | I/O stack location | място на В/И стек (The part of an I/O request packet (IRP) that is allocated for each driver in a chain of layered drivers. Each driver owns one of the stack locations in the packet and obtains driver-specific information about what input/output (I/O) operation to perform on the specified device. The driver must use the supplied parameters) |
| law | judgment n.o.v. | решение въпреки присъдата на съдебните заседатели (алешаBG) |
| life.sc. | O2-electrode | кислороден електрод |
| health., anim.husb. | O'Hara's disease | туларемия |
| chem. | O< | трихидроксицианидин |
| chem. | O< | 2,4,6 - триазинтри-ол |
| chem. | O< | цианурова киселина |
| agric., chem. | O,O< | малатион |
| forestr. | o - ring | уплътнителен пръстен |
