[IshKebab]

I've never seen a vaguely popular programming language use ¬ and that is available on all keyboards (for some weird reason).

[pathsjs]

It surely is not avaiable on mine. Maybe it's a local thing?

[yathern]

I believe UK keyboards?

I say this because when installing a new OS and it defaults to en-UK locale, some of my buttons on the right side of the keyboard do unexpected things (US here), and I always have to look up where exactly the single-quote button is. I believe sometimes that angle pops up.

[sigzero]

I have only seen Applescript use it.