The word "spa" is an acronym for the Latin phrase "Sanus Per Aquam" which means "health through water." The Romans would have been the first Westerners to discover and enjoy the benefits of natural spring mineral water treatments, and it is said that it is they who have coined the word spa. Although spas are more popular than ever, the tradition itself is ancient. Archaeological finds in Asia suggest that bathing in mineral water goes back to the Bronze Age, about 5,000 years ago. In education, spas fall under the hospitality industry. Some universities such as California State University at Irvine have specific course programs that deal with the spa and hospitality market. Modern spas are now much more developed and segmented in North America than in any other part of the world. From almost nothing a decade ago, the spa industry in the United States experienced a phenomenal growth to $11.20 billion by 2005. Hotel and resort spas, destination spas, day spas, medical spas only recently entered the European spa market's vocabulary.