CD-ROM or DVD disc over a white background.
The top disc surface is blue and reflects the light forming a rainbow effect.
CD-ROM is an acronym for Compact Disc - Read Only Memory.
DVD is an acronym for Digital Versatile Disc or Digital Video Disc.
CD-ROMs and DVDs are optical disc storage media format that can be used for data storage, including computer software, audio and videos.
Discs are made from a 1.2 mm thick disc of polycarbonate plastic, with a thin layer of aluminium to make a reflective surface.
The most common size of CD-ROM and DVD disc is 120 mm.