3D optical disc storage
Digital optical micro-system
digital optical televiewer
Digital Optical Transceiver
optical digital processor
Digital Archived Digital Publish
Digital Radiography Digital Radiograph
(OCR) Optical Character Recognition Equipment(OCR)
(OTDR) Optical Time-Domain Reflectometers(OTDR)
1 550 nm optical fiber transmission system
1 550 nm optical transmission
1 550nm Optical Transmission
1550 nm Optical network
157nm optical lithography
157um optical lithography