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| Subject | English | Irish |
| comp., MS | backward compatibility | comhoiriúnacht shiarghabhálach (The capability of source code or programs developed on a more advanced system or compiler version to be executed or compiled by a less advanced (older) version) |
| comp., MS | backward compatible | comhoiriúnach go siarghabhálach (Pertaining to a product or version that is able to interact with previous versions) |
| comp., MS | backward-compatible | comhoiriúnach go siarghabhálach (Pertaining to a product or version that is able to interact with previous versions) |
| econ. | backward integration | cúlchumasc |
| market. | backward linkage | cúlnascáil |
| market., fin. | backward projection | réamh-mheastachán droim ar ais |
| market., fin. | backward projection | cúl-réamh-mheastachán |
| comp., MS | backward signing | síniú siarghabhálach (A condition of a handwritten signature, in an image or .ink file, that specifies the direction of the characters in the signature, right-to-left or left-to-right) |
| transp. | backward tilt | cúlchlaonadh |