Stone knives and bearskins

From Memory Alpha, the free Star Trek reference.

"Stone knives and bearskins" was a colorful term employed by Spock to describe the 1930s technology he was forced to use to construct a tricorder interface. Vital information was locked within Spock's tricorder: How had Leonard McCoy changed history? Spock was eventually able to construct an appropriate circuit, but retrieved two separate recordings: one in which Edith Keeler lived, and one in which she died. At that point, the improvised interface erupted in sparks and flame, ruining his chance to learn which on the recordings represented McCoy's alteration, and which the correct timeline. (TOS: "The City on the Edge of Forever")

Kathryn Janeway also used this expression when typing on a late 20th century computer keyboard trying to find out information about Henry Starling. (VOY: "Future's End")