My grandmother just got a new computer, but she has no clue how to use it.
One night she called my father with a computer problem. “I bought a CD
today, but it won’t fit in the CD drive in the computer. What’s wrong?”
asked my grandmother. “Ma,” my father replied, “you never had a CD-ROM
drive in the computer.”
My grandmother thought the floppy drive, was for CD-ROMs.