Digging through some boxes, I came accross a piece of computer nostalgia: an acoustic coupler circa 1985. I don't know where it came from (at the time, I was an infant, neither of my parents knew what a computer was) but here it is.

So, what's the oldest computer-related item in your possession?

I'm going to bury most here from the get-go.
In 1949 I learned to count and do math with an ancient Chinese computer.
I also learned my alphabets from it. I was four years of age.
The item was circa 1100ad as best we can tell. I still have it as a prized possession, though it requires some repair now and ?tunning.
What was that computer called? Wasn't an Apple, or a Sun, or a ?

Well that beats my new-fangled (by comparison) entry by at least a decade or two, right?

I cheated of course.
The abacus is considered to be the first "computer".
Mine needs some brass re-wiring and cleaning too.
The older models are as delicate to deal with as today electronic models.
It's harder to find a qualified tech to do such as it is to find someone to work on old Sun computers.

Back to the real question you posed now.

I found a 5 1/2 inch floppy disk, Elephant brand, used in a computer class in 1982 or 1983 in my stuff a few months back. There might be some older stuff at home, but not too likely. We never had money for that stuff. Now my next door neighbors . . .

Orange Blossom

We have our old TI computer stuck in a box around here somewhere. That was one weird computer. It used a TV set for a monitor, ran programs off of cartridges, and saved data to a tape recorder. o_O

We also have our old 486 sitting up in the attic. It was actually upgraded from a 386DX, I kept the old part around because the chip was an AMD, and when I first saw it I hardly believed it. I didn't realize they were making x86 compatible chips from that long ago.