| Subject | English | Japanese |
| comp., MS | map control block | マップ制御ブロック (A structure that file systems use to map the virtual block numbers (VBNs) for a file to the corresponding logical block numbers (LBNs) on the disk) |
| comp., MS | volume map control block | ボリューム マップ制御ブロック (An opaque structure that stores virtual block number (VBN) to logical block number (LBN) mappings for an a volume file of a file system) |