Andrew Lekashman offers a brief pictorial a history of mechanical keyboards, from adding machines to dumb terminals to Symbolics monstrosities to modern blank-key hacker totems. There was a lot of ingenious tech left by the wayside on the way to finding the perfect click.

Pictured above is one not included in the roundup, a particularly beautiful Raytheon(!) model that can be bought on eBay for $300, then sent to me.

Lekashman's tastes are grittier: