srfi-113 looks like a useful package.  On first reading I am concerned
that heavy use as a noun of the word "set", which is already so common
as a verb in Scheme and its libraries, will cause great confusion to
anyone unfamiliar with srfi-113.

SRFI-1 has 13 procedures treating lists as sets.  The prefix for each of
these procedures is "lset", which is different enough from "set" to
avoid confusing them.

Is there some other name which might serve instead of "set" in srfi-113?
Two possibilities are "gset" for set with general object membership and
"dset" for set with distinct (non-repeated) elements.