| Subject | English | Bulgarian |
| comp., MS | First Expiry First Out | Изписване от склад по срок на годност (A method used for determining the order in which goods should be taken out of inventory, so that items with the earliest expiration dates are taken first) |
| account. | first in-first out method | метод на "първа входяща - първа изходяща стойност" |
| fin., IT | first in, first out principle | принцип FIFO |
| comp., MS | first out | първи влязъл (A method for processing a queue in which items in the queue are removed in the same order in which they were added) |
| comp., MS | first out | първи излязъл (A method for processing a queue in which items in the queue are removed in the same order in which they were added) |