alarm
alert
attention
ban
business
caution
closeup
colorful
communication
concept
cross
danger
desk
education
forbid
forbidden
hand
handwritten
hazard
indication
information
mark
message
no
note
notepad
notes
notice
office
paper
person
prevent
prohibited
protest
public
red
reflection
restrict
risk
safety
school
signal
sticky
sticky notes
stop
symbol
text
warning
work
write