Hardware Abbreviations and Acronyms
- OCROptical Character Reader
- ODOptical Disk
- ODAOpen Development Architecture
- ODCoptical disc cartridge
- ODDEOptical Disc Drive Emulators
- ODFOpen Design Foundjtion
- ODMOriginal Design Manufacturer
- OEOperating Environment
- OEOutput Enable
- OEMOriginal Equipment Manufacturer (usually in reference to car parts)
- OFCOptical Fibre Cable
- OHPOverhead Projector
- OHTOverhead Transparency
- OHVOverHead Viewer
- OIROnline Insert and Removal
- OISOpen Interconnected System
- OITOperator Interface Terminal
- OLTEOptical Line Termination Equipment
- OMEROptical Music Easy Reader
- OMROptical Music Recognition
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