Came across some things that younger people may never know about. Thought it might be fun to think about
Things that won’t get recycled (at least in their present (past?) condition):
Typewriters, slide rules and encyclopedias
Phone tables. With phones on them and the White Pages and the Yellow Pages on that little shelf underneath.
A physical dictionary — either for spelling or definitions.
Flash cubes. (Actually, I even remember when flash cubes were an exciting innovation over flash bulbs.)
And skills youngsters will never develop:
Inserting a VHS tape into a VCR to watch a movie or to record something.
Booting your computer off of a floppy disk.
Using a road atlas to get from A to B. Having to manually unlock a car door.
Using a stick to point at information on a wallchart.
Taking turns picking a radio station for everyone to listen to during a long drive.
Finding books in a card catalog at the library.
What a casette player is and having to rewind the tape over and over just to hear your favorite song. The connection between a pencil and a cassette tape.
And sounds they’ll never hear:
Scanning the radio dial and hearing static between stations.
The scream of a modem connecting.
The sound of a hand crank rolling up the car window.
“I got it… you can hang up now”
And stuff I wish was still around:
Carrying on a correspondence with real letters, especially the handwritten kind.
Drive In movie theaters
The excitement of finding a dime in the pay phone coin return.
Remembering someone’s phone number. (Actually, I miss remembering my own. Plural.)
When you had to know how to spell.
And a few things I’m glad are gone:
The smoking section in the back of the plane.
Trying to peel the perforated edges off tractor-feed printer paper.
8-character filenames.
Long distance (you know, as in you don’t call someone because it’s long distance.)
Lots of these ideas came from here. And some from here. And some from other places. The phone table photo’s from here.
Auntie Kate The Resale Expert 
Another one they’ll never know is having to get up to change the TV channel. Maybe if the remote hadn’t been invented, there would be fewer pounds on us all.
And maybe we’d watch less mindless TV 😉
How about the click, click, click of the TV dial going round all 29 channels before you broke down to check the UHF? 🙂 …Those were the days…
That was fun, Kate. I took my three stepkids on a plane in the spring and they didn’t believe me that there was once a smoking section. The absurdity of it just baffled them. Here in Ontario, we don’t even have smoking sections in restaurants and bars anymore.
I showed them a vinyl LP a while back. It was fun to see their puzzled looks!
I’m just in my late 30s……we had a remote with a wire to the vcr!!
Rotary dial phones
Atari
And I agree to your list of “glad their gone.”