That's true. And APL and its children is still quite popular in finance.

By the way, I found a rather neat page about building a Jupiter ACE: http://searle.hostei.com/grant/JupiterAce/JupiterAce.html

Mentioning APL in this context makes me picture an 8 bit home computer with an APL interpreter. I mean, the C64 had all kinds of weird symbols on its keyboard, too. And the magazines would save quite some pages for their source code listing compared to BASIC...

According to Wikipedia, the first implementation of APL on a micro was on the 8008, in '73. It wasn't very good, but it did run...

Later ('77), TIS APL ran on Z80 systems, and was aparently quite a bit better, although it wasn't a full implementation.

But I'm just quoting Wikipedia at this point, so look it up yourself.