GE Mini COM Express 10 Hardware Reference Manual page 5

Safety Symbol Legend
Indicates a procedure, condition, or statement that, if not
strictly observed, could result in personal injury or death.
Warning
Indicates a procedure, condition, or statement that, if not
strictly observed, could result in damage to or destruction of
equipment.
Caution
Indicates a procedure, condition, or statement that should be
strictly followed to improve these applications.
Attention
For public disclosure