this post was submitted on 02 Jul 2025
1 points (100.0% liked)

Today I Learned (TIL)

826 readers
15 users here now

You learn something new every day; what did you learn today? Submit interesting and specific facts about something that you just found out here.

founded 2 years ago
MODERATORS
bot@lemmit.online
1
TIL recording sound on magnetic wires was used before magnetic tapes in the early 1900s, and use of magnetic wires persisted into the 1960s for recorders designed for stealth use, including one wi... (en.wikipedia.org)
submitted 2 months ago by bot@lemmit.online to c/todayilearned@lemmit.online
0 comments fedilink hide all child comments
 
This is an automated archive made by the Lemmit Bot.

The original was posted on /r/todayilearned by /u/jacknunn on 2025-07-02 03:47:38+00:00.

Original Title: TIL recording sound on magnetic wires was used before magnetic tapes in the early 1900s, and use of magnetic wires persisted into the 1960s for recorders designed for stealth use, including one with a microphone disguised as a wristwatch

no comments (yet)
sorted by: hot top controversial new old
there doesn't seem to be anything here