Bring back 10 key adding machines, manual typewriters, file cabinets, and carbon paper.
While we’re at it, can we bring back incandescent bulbs? I hate those bleeping LEDs.
Most of the youngn’s nowadays would have trouble using those devices. They could come in handy with blackout conditions.
There are markets for old style vinyl records and turntables. I have seen some youngn’s amazed at how the grooves on a vinyl platter can produce sound!