(n,adj-no) optics
(P)
(n) spectroscopy
(n) optical isomerism
(n) optical instrument
(n) optical instrument
(n) fiber optics
fibre optics
(n) optical character
(n) fiber optics
fibre optics
(n) optical microscope
(n) (comp) optical mouse
(n) (comp) optical scanner
(n) (comp) optical scanner
(n) (comp) optical character recognition
OCR
(n) (comp) optical character recognition
OCR
(n) (comp) mark scanning
optical mark reading
(n) (comp) optical character reader
OCR
(n) (comp) optical character reader
OCR
(n) (comp) Optical Mark Reader
OMR