What does the "s" stand for in perls?

Our eminent brother kcott cannot remember what the "s" stands for in perls. What do you suppose is its real meaning?

Update: Added "Sum" for 1nickt.

Update 2: De-linkified title for pollsters.

🦛

In reply to Re: poll ideas quest 2021 (perls) by hippo
in thread poll ideas quest 2021 by pollsters

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