alarm
alert
alertness
attention
banner
button
caution
computer
confirmation
contemporary
control
danger
dangerous
display
error
exclamation
failure
form
glyph
harmful
icon
illustration
information
interface
isolated
link
marker
message
modern
orientation
pc
point
post
problem
protect
risk
safe
safety
save
secure
security
sign
signal
support
symbol
system
warning
web
window