[jamescun]

Back in the late 90s I had a Toshiba Satellite Pro 420 with the green nipple mouse. It was by far better than any touchpad that came along until very recently.

(If anybody knows the actual term other than "nipple mouse" please let me know).

[nix0n]

According to https://xkcd.com/243/ it's either TrackPoint(tm) or "clit mouse"

[jarek]

https://en.wikipedia.org/wiki/Pointing_stick

[henvic]

I loved these nipples. Only Apple's trackpad is better than it.