The index used by the os to manage computer files is called

api
fat
gui
ram

hey bud it's your ole pal paps

sans and i came to help by giving some tips this will surely help and jolt the memory.

Keeping track of these files is a big job. To perform this task, the OS makes an index of all the files stored on the computer. This index is called a File Allocation Table (FAT). The OS updates the FAT every time a file is created, renamed, moved, or deleted.

-paps & sans