Here’s another Friday Funny:
The [Esc] (Escape) key is always good for a few laughs! The Escape key goes back to 1960 and IBM, and has been with us ever since.
It’s an ASCII control character, the one that follows Ctrl+Z. You sometimes do see it as Ctrl+[. The glyph defined in ISO made its way into Unicode as “⎋” (broken circle with northwest arrow — probably won’t render on most displays — see image below).