TSP is also an
acronym for the
Toledo Service Project (also known as
FOCUS Toledo), an
organization that helps to clean up
Toledo, Ohio. It gives
youth and adults an
opportunity to participate in
urban ministry all year long by doing
restoration projects and
workshops. My
church group helped them out during the
summer.
Part of what we had to do involved using the other TSP, trisodium phosphate. The two were often confused. Trisodium phosphate, as Stavr0 states above, is a very powerful detergent. We used it to clean walls in an older house, and it took the junk right off. It comes in a bluish-colored milk carton type thing, and has a "Caution: Corrosive" warning on it.
Also of note: trisodium phosphate is an ingredient in Cheerios, among other General Mills cereals. Apparently, according to one source, it makes the Cheerios float. Yummy.