[msk-lywenn]

I've been searching and can't find it: A in ARC is for automatic, what does the O stand for?

[dinHeld]

O is a visual pun because it adds a cycle collector to ARC.

[lambertsimnel]

I assumed the O was for "optimised", but apparently it stands for "cycle":

https://nim-lang.org/blog/2020/12/08/introducing-orc.html