| Subject | English | French |
| comp., MS | Single Instance Store A component that saves disk space on the server by maintaining a single physical copy of all identical files found. If SIS finds a duplicate file on the server, it copies the original file into the SIS store and leaves a link where the original resided. This technology is used only with Remote Installation Services | SIS (Single-Instance-Store) |
| comp., MS | single instancing | instanciation unique (A technique used within the file-based imaging process that allows you to store two or more copies of a file for the space cost of one copy) |