LeapFrog on X: "What's the date today? 10-4, good buddy! But why do we say "ten four" to mean "understood?" It's from old radio codes! 📻📻📻 #LeapFrog #DidYouKnow #LetsRecordMusicPlayer https://t.co/Kf7K1LzDHF" / X
The police alphabet: an important 'language' for LEOs