The specific "zip" file you are looking for likely refers to a compressed data package containing these reference codes. Common contexts include:
: Sometimes used for "Travaux de bureaux" (Office Work) in specific curriculum codes. How to Locate the File
: Can stand for "Business Law & Finance" in secondary school course lists.
: In military education records, these acronyms represent specific course tracks: BLF : Managerial Assessment Orientation.