allowed
antenna
ban
blank
broadcasting
button
caution
communication
connection
danger
digital
dish
forbidden
global
icon
illustration
label
media
military
navigation
network
no
object
parabolic
prohibited
prohibition
radar
radio
receiver
safety
satellite
scan
scanner
science
sign
signal
sky
sonar
space
station
stop
symbol
target
technology
tv
war
warning
wave
web
wireless