Toshiba Satellite W30t-A Series User Manual page 18

Indicates a potentially hazardous situation, which could result in death or
serious injury, if you do not follow instructions.
A caution informs you that improper use of equipment or failure to follow
instructions may cause data loss, equipment damage, or may result in
minor or moderate injury.
Please read. A note is a hint or advice that helps you make best use of
your equipment.
User's Manual 1-14