Toshiba M500D User Manual page 222

204
Glossary
write protection: A safeguard that physically prevents you from deleting
the information on a 3.5-inch diskette or other storage media. A
diskette has a small square hole with a plastic tab. To protect
information on the diskette, slide this tab to uncover the hole.
Z
zoom: A feature in many applications that makes an object on the screen
smaller or larger.