WRONG:

CD-ROM disk

RIGHT:

CD-ROM

“CD-ROM” stands for “compact disc, read-only memory,” so adding another “disc” or “disk” is redundant. The same goes for “DVD” (from “Digital Video Disc” or “Digital Versatile Disc"”—there are non-video versions). Don’t say “give me that DVD disk,” just “give me that DVD.”

List of errors