Common Lisp

You've got a lisp.

He speaks with a lisp.

Our HTML was all generated by Lisp.

Our CSS was all generated by Lisp. Javascript.

I'm not to get in to the details of it, but Lisp was all we had. We had Lisp plus Postgres.

An extensible window manager scriptable with an Emacs Lisp like language

And the switch from Lisp to Python was kind of performance agnostic.

One of the other professors here in Udacity, Peter Norvig, is one of the world's Lisp experts and a couple of his books are extremely good on the topic of Lisp.

Yeth, I know, The lisp malfunction has been reported to the scutters, Thorry for the inconvenienth,

During this time, we had variable traffic, but everything was in Lisp our Handlers, as you'd expect.

And the first change that Aaron and I made together was we reroute Reddit from Lisp to Python.

Languages like Lisp and Scheme are designed this way to make it very efficient to do recursive calls.

Lisp is a language that lands itself to generating other languages and other pieces of code really, really nicely.

Lisp was a faster language but our rewrite of Python was better, so the code actually run at about the same speed.

When we started, the first vision of Reddit was written in Lisp, which is an actually very old programming language, one of the first ones.

At the time we are still plagued by downtime, whether it was our Lisp or a Python program, it would occasionally just crash and we'd have to get notified more often I'd just get called.