Fujitsu M3099EX Reference Manual page 6

Conventions
Special information, such as warnings, cautions are indicated as follows:
WARNING
WARNING indicates that personal injury may result if you do not follow
procedure correctly.
CAUTION
CAUTION indicates that damage to the scanner may result if you do not follow
a procedure correctly.
The following symbols are used in this manual.
Used for general WARNING and CAUTION.
Be careful not to pinch your fingers or hands.