Anthropology

are the black Bakelite telephone bodies, that stuff doesn't biodegrade and it's hard to break, unlike the flimsy laptop cases and screens.

They'll also find gold teeth from the same period and marvel at the painful lengths people went to for cosmetic beauty, they must have been the priesthood.

Other things that will survive are the ceramic supports for high tension wires and maybe a rare Le Creuset frypan, that stuff is really hard to kill. Glass floats for Japanese fishing nets will wash up for centuries, undoubtedly offerings to the sea gods.

Archaeologists have been puzzled by these: https://www.mentalfloss.com/article/514246/are-roman-dodecahedrons-worlds-most-mysterious-artifact They've been fund by the thousands at Roman military encampments. I'm one of the knitters who looked at them and saw jigs for knitting fingers to leather gloves. It wouldn't have been fine work, the wool would have been heavy or they'd have worn through in a day, but I can see Roman soldiers using these things during their down time, repairing gloves and making spares for the times they were busy with cold hands, fighting barbarians.