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Term 1: Term 2:

(subclass OpticalDisc DigitalDataStorageDevice) Media.kif 1128-1128 Optical disc is a subclass of digital data storage device
(subclass CompactDisc OpticalDisc) Media.kif 1154-1154 Compact disc is a subclass of optical disc
(subclass BluRayDisc OpticalDisc) Media.kif 1187-1187 Blu ray disc is a subclass of optical disc
(subclass DVD OpticalDisc) Media.kif 1255-1255 DVD is a subclass of optical disc


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