What does STON stand for?

Daylight Industries, Inc. (SAUS)

GreenStone Indus - NASDAQ symbol

GreenStone Industries, Inc. - NASDAQ symbol (SAG)

Short Ton - 2000 lbs. (AABC)

Stonechat - Common English name - American Ornithologists Union four-character bird identification - Scientific name: Saxicola Torquatus (IBP)

Stoner Trail - NCIC trailer make code