When Freedom of Information Act (FOIA) requests are processed by the FBI, they will send CD’s (or printed pages) of “pre-processed pages”. This speeds up processing time, and generally (according to the FBI) the pre-processed pages that were released in previous FOIA requests, generally satisfies each respective request.
If the pre-processed package does not seem to contain what a requester is looking for, they can then go after additional pages, and file another request (which generally gets tacked on to the first case number, unless 30+ days pass).
In April of 2017, I went after what I believed should exist, which is a reference list of all pre-processed pages, of various file subjects. It took until August of 2020, but the FBI released the 192-page list, in FULL.
This is the most complete list released by the FBI via the FOIA, that The Black Vault is aware of.
It is available below.