Multiple choice technology What was the first ARPANET message? "lo" "hello world" "mary had a little lamb" "cyberspace, the final frontier" Reveal answer Fill a bubble to check yourself A Correct answer Explanation The first ARPANET message was 'LO' - sent in 1969 by Charley Kline attempting to type 'LOGIN', but the system crashed after the first two letters. This became famous as the humble beginning of networked communication.