this post was submitted on 02 Mar 2024
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[โ€“] Setarkus@lemmy.world 11 points 8 months ago (2 children)

Someone tell the german schools

[โ€“] acockworkorange@mander.xyz 2 points 8 months ago

I had a professor in uni in 2005 that used those. Those were called retroprojectors in Portuguese. We called him the retro professor.