Not looking like a fool

Help, I looked at WIKI but can't see the difference between a s-box vs

I am looking at the idea of using a series of s-boxes(?) that has an
eight(8) bit input that gives a 23 bit value that is exculsive-ored
with the output of the other s-boxes(?).

There are separate s-boxes(?) for every byte position in the string to
be hashed.

The idea is the resulting hashed value will spread the hits evenly
across the hash_table.

Is this a s-box or p-box?

Yes, it may be a dumb question, but for some reason when I think about
it the answer just seems to skip off my brain.