01. What does XXX stand for? TLA Three Letter Acronym ACL Access Control List PIN Personal Identification Number TCB Trusted Computing Base ALRU Automatic Line Record Update AN Associated Number ARSB Automated Repair Service Bureau ATH Abbreviated Trouble History BOC Bell Operating Company BOR Basic Output Report BOSS Business Office Servicing System CA Cable COE Central Office Equipment COSMOS Computer System for Main Frame Operations CMC Construction Maintenance Center CNID Calling Number IDentification CO Central Office COCOT Customer Owned Coin Operated Telephone CRSAB Centralized Repair Service Answering Bureau DDD Direct Distance Dialing ECC Enter Cable Change LD Long Distance LMOS Loop Maintenance Operations System MLT Mechanized Loop Testing NPA Numbering Plan Area POTS Plain Old Telephone Service RBOC Regional Bell Operating Company RSB Repair Service Bureau SS Special Service TAS Telephone Answering Service TH Trouble History TREAT Trouble Report Evaluation and Analysis Tool LOD Legion of Doom HFC Hell Fire Club TNO The New Order ACiD Ansi Creators in Demand CCi Cybercrime International FLT Fairlight iCE Insane Creators Enterprise iNC International Network of Crackers NTA The Nocturnal Trading Alliance PDX Paradox PE Public Enemy PSY Psychose QTX Quartex RZR Razor (1911) S!P Supr!se Productions TDT The Dream Team THG The Humble Guys THP The Hill People TRSI Tristar Red Sector Inc. UUDW Union of United Death Workers