Engineering Abbreviations
"A",
"B",
"C",
"D",
"E",
"F",
"G",
"H",
"I",
"J",
"K",
"L",
"M",
"N",
"O",
"P",
"Q",
"R",
"S",
"T",
"U",
"V",
"W",
"X",
"Y",
"Z"
'Oa' to 'Om', 'On' to 'Oz'
| ONA | - | open network architecture |
| OP iLink | - | FireWire, Sony [Firewire Bus] |
| opm | - | operations per minute |
| OPMODEL | - | operations model |
| OPSEC | - | operations security |
| OPU | - | Optical channel Payload Unit |
| OPX | - | off-premises extension |
| OS | - | Operating System [OS Vendors] |
| OS2 | - | Operating System/2 [Out-dated IBM OS] |
| OSD | - | On Screen Display |
| OSHA | - | Occupational Safety and Health Administration |
| OSI | - | open switching interval |
| OSI | - | Open Systems Interconnection [OSI Definition] |
| OSI-RM | - | Open Systems Interconnection-Reference Model |
| OSP | - | Organic Solderability Preservation |
| OSRI | - | originating stations routing indicator |
| OSSN | - | originating stations serial number |
| OTA | - | Operational Transconductance Amplifier |
| OTAM | - | over-the-air management [automated HF network nodes] |
| OTAR | - | over-the-air re-keying |
| OTDR | - | optical time domain reflectometer [OTDR Gear] |
| OTES | - | Outside Thermal Exhaust System |
| OTN | - | Optical Transport Network [OTN] |
| OTP | - | One Time Programmable [Integrated Circuit] |
| OTS | - | Off-The-Shelf [COTS Definition] |
| OTU | - | Optical channel Transport Unit |
| OUM | - | Ovonics Unified Memory [Manufacturers of OUM IC's] |
| OVLO | - | Overvoltage Lockout |
| OW | - | OrderWire [circuit] |
