| Subject | English | Hebrew |
| comp., MS | Space Bitmap Descriptor | מתאר מפת סיביות של שטח (A bitmap describing the utilization of blocks allocated to a metadata partition) |
| comp., MS | volume bitmap | מפת סיביות של אמצעי אחסון (A stored reference (which may exist both on hierarchical directory volumes and in memory) to every piece of data that is in the allocation blocks and indicates whether the block is allocated or free for use) |