| Subject | English | Bulgarian |
| comp., MS | bits per second | бита за секунда (The number of bits transmitted every second, used as a measure of the speed at which a device, such as a modem, can transfer data) |
| comp., MS | frames per second | кадри за секунда (The number of video frames displayed per second. Higher frame rates generally produce smoother movement in the picture) |
| comp., MS | kilobits per second | килобита за секунда (Data transfer speed, as through a modem or on a network, measured in multiples of 1,024 bits per second) |
| comp., MS | kilobytes per second | килобайта за секунда (Data transfer speed, as on a network, measured in multiples of 1,024 bytes per second) |
| el. | megabit per second | мегабита в секунда |
| el. | megabits per second | мегабита в секунда |
| comp., MS | millions of instructions per second | милиони инструкции за секунда (A common measure of processor speed) |
| construct. | specific ratio of water consumption per second | коефициент за секундния неравномерен разход |