[gee_totes]

I've always wondered: why is it a locomotive? Why not a penguin or something else?

Just thinking aloud here: ls stands for 'list'.... so sl stands for 'tsil'.... which is a model of a train? No, that's not it.

I think there's a missing part to this joke.

[edit] Just stepped away from my desk and took two steps and figured it out: sl = steam locomotive

[pifflesnort]

Regarding the penguin: sl(1) was originally written in 1992; Linux itself didn't hit 1.0 until 1994, and the Linux penguin itself wasn't introduced until 1996.

[jurre]

sl, steam locomotive.