| Subject | English | Tamil |
| comp., MS | backward compatibility | முற்பதிப்பு இணக்கம் (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 slash | பின்னோக்குச் சாய்வுக்கோடு (A character used to separate directory names in MS-DOS and UNIX path specifications. When used as a leading character, it means that the path specification begins from the topmost level for that disk drive) |