here you go fedi.

[xgranade@wandering.shop]

@kirakira @SnoopJ Now I'm just remembering transparent calculators used with those things, lolz.

[snoopj@hachyderm.io]

@xgranade @kirakira whoa, I don't think I've seen one of those. That's pretty awesome though!

[oneiros@ruhr.social]

@kirakira
Donald Knuth is giving a presentation?
@xgranade

[xgranade@wandering.shop]

@SnoopJ @kirakira One example of:

https://www.reddit.com/r/mildlyinteresting/comments/1004zfc/see_through_calculator_for_use_on_an_overhead/

[epic_null@infosec.exchange]

@kirakira Oh man I remenber those!

Kinda miss em?

[mrbruno@mstdn.social]

@kirakira Hells yeah!

How about one out those crappy filmstrip projectors?

[emilycat@transfem.social]

@kirakira@furry.engineer I feel so old... lol

[okohll@hachyderm.io]

@mxchara @kirakira one thing I'll never forget is a lecturer spitting on the acetate before wiping it to clear

[retreival9096@hachyderm.io]

@kirakira actually remember getting my "slides" printed on plastic to use one of those for a presentation. That had to wait for spreadsheets and presentation software though ...

[damonhd@mastodon.social]

@Retreival9096 @kirakira I remember drawing slides with special felt-tips on acetates!

[margaretsefton@writing.exchange]

@kirakira That reminds me of dark classrooms and cutting up during presentations.

[wyatt_h_knott@mastodon.sdf.org]

@kirakira My HS art teacher in 1986: you can always just use an overhead projector to get your drawing onto a canvas.
Me, in 2026: "always"?

[subrealz@infosec.exchange]

@kirakira
There’s an awesome defcon talk, from this year I guess (you can get your hands on it on their YT) involving a guy (Cliff Stoll) who could very much be Rick from “Rick and Morty” - or maybe Emmet “doc” Brown, from return to the future - and one of those retro-thingy machines.
I’ve never seen a man operate one of those with such skills

[nusher@mastodon.scot]

@kirakira We used to do our tutorials on acetates, were loaned the pens and a single sheet that then got wiped and reused. Quicker and easier than PowerPoint.

[foxgirlriley@transfem.social]

@emilycat @kirakira@furry.engineer saaaame ​​ x3

[heidi@discuss.systems]

@kirakira

Peak post!

[knodel@mastodon.de]

@kirakira

A friend sabotaged these projectors by blocking the ventilation slits so that the halogen bulb inside overheated.

I still use one as a light source with a continuous spectrum. Hard to find these days.

[arisummerland@beige.party]

@kirakira Oooooooh! Takes me back.

[swordsmasher@meow.social]

@kirakira god this takes me back to elementary school in the mid 2000s... im not that old, right?

[ericlawton@kolektiva.social]

@EndlessMason

I made my first presentations with a set of coloured pens. And the foils were $3 each or about $8 in today's money.

@deersyrup @kirakira