What is an index used by the OS to manage computer files?

An index used by the operating system (OS) to manage computer files is typically a data structure that keeps track of the locations of files on a storage device. It allows the OS to quickly access and retrieve files by maintaining information such as file names, sizes, and metadata. This indexing system enhances file search efficiency and supports file operations like opening, reading, and writing. Common examples include file allocation tables (FAT) and inode tables in Unix-like systems.