OCROptical Character Reader / Optical Character Recognition
RBOCRegional Bell Operating Company(ies)
SCLMSoftware Configuration and Library Manager
AVCSAdvanced Vehicle Control Systems
HOBHierarchical Operational Binding
FODFax On Demand / Finger Of Death / Format Office Document
TGIDTrunk Group Identification Number
TIRISTexas Instruments Registration and Information System
CASECommon Application Service Element / Computer Aided/Assisted Software Engineering
VSLIVery Large Scale Integration
LLILunatic Labs Incorporated
TSO/ETime Sharing Option / Extensions
NSSIINetwork Supervisory System II
Ob-[as a prefix] obligatory