Replacing intimidating diagnostic text, the smiling computer icon reassured anxious new users that the system's hardware and software were functioning correctly.

Microsoft included the card game as a stealthy training tool to help a generation of users master using a computer mouse without realizing they were learning.

Known as a Bowen knot or "loomed cross," this symbol is still used on road signs throughout Scandinavia to direct travelers to places of cultural interest.

Affectionately named Clarus, this bizarre hybrid animal would flip sideways or upside down in the Page Setup menu to visually represent how the final print would appear.