>  "Produce" is a term I've never seen used this way before, and I assume it is unique to Raku.

More commonly referred to in the functional languages as a `scan`, but yes, it seems that `produce` might be unique to Raku. I've not seen `accumulate` outside of Python, but there's a lot of langs so who knows.

code_report (Conor Hoekstra) has discussed the difference names of `scan` on a couple occasions, eg: https://twitter.com/code_report/status/1246494250537291776

Connor has declared a fondness of APL's where fold and scan show a clear visual relation: `/` & `\`. I suspect Raku was shooting for something similar with it's choices:

[f] list # or list.reduce(f)

[\f] list # or list.produce(f)