this post was submitted on 20 Oct 2025
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[–] GreenMartian@lemmy.dbzer0.com 6 points 4 months ago (2 children)

Even in the communications context. We've had two-way radio comms for a really long time. Walkie-talkies have been around for almost 90 years.

[–] cron@feddit.org 2 points 4 months ago

You're right, while it was less common than today, it would have made sense in some contexts.

[–] Pat_Riot@lemmy.today 2 points 4 months ago

10 codes are from the 30s. 10-20 is where are you.