The term CAL POLY CITY is composed of two words, SLO and POMONA. SLO stands for San Luis Obispo, a city located in the Central Coast region of California. It is home to California Polytechnic State University, commonly known as Cal Poly. POMONA is a city located in Los Angeles County, California. It is home to the Pomona campus of Cal Poly, which is part of the California State University system.