Indy 500 vehicle
radar
radar
radar
radar
Radar
probably radar
RADAR (RAdio Detection And Ranging)
no, first mobile device was a knife...
RADAR (RAdio Detection And Ranging)
RADIO
RADAR
radar
radar
radar
radar
rotor, rotator
A radio telescope
Radio Telescope
Radar
Radar locates objects with radio waves.
R a d a r
R a d a r