NTFS file system manages - Terminology of NTFS file system

NTFS file system terminology
LCN: Logical Cluster Number
VCN: Virtual Cluster Number
BPB: BIOS Parameter Block
FSD: File System Driver
SCB: System Control Block
FCB: File Control Block
EFS: Encrypt File System
MFT: Master File Table
MFT Mirror: Master File Table Mirror

Metadata: It's data stored in volume, supporting file system management. It cannot be visit by application program, just provides service for the system.