It's amazing how much a few KB of memory could achieve then. APL may perform extremely well on phones and watches nowadays. I can't believe no one is doing it.
I have J on my phone, and it works well as an advanced programmable calculator.
Looks like the author of this, Ken Van Bree is still around; he left Agilent in 2003 to start a construction imaging software business. Just did a presentation at the SPAR3D conference last month.
Got to love Fig. 2. APL was the first language I learned, in 1976. When I was in the position to have to use Fortran, I was horrified. I have to write loops for everything?! But nowadays, I think array Fortran is quite nice.
There's a few videos on YouTube of someone demoing APL in a modern context, and dictating the meaning of the symbols aloud; it felt strangely cryptic, but I'm sure someone who's worked with APL for some time would probably be able to latch onto it okay.