You can program in APL without a special keyboard. Most editors offer a prefix key (commonly `, but I switch it to . since that's easier to type) so you can typ

You can program in APL without a special keyboard. Most editors offer a prefix key (commonly `, but I switch it to . since that's easier to type) so you can type .i and get ι as a result. It's an extra character, but once you get accustomed to it the typing is pretty fast and avoids changing keyboard layouts or key chord. In fairness, I already type at about 120 wpm so adding an extra character per special character in an already terse language doesn't significantly impact my typing speed.