The document provides information about radio stations in the Philippines. It discusses the history of radio stations in the country, including the first stations established in the early 1920s. It also describes the different types of radio stations, specifically AM and FM stations. AM stations employ amplitude modulation technology and were the first method developed for audio transmissions. FM stations use frequency modulation technology and are capable of better sound quality. As of 1997, the National Telecommunications Commission reported there were a total of 629 radio stations in the Philippines, with 330 being AM stations and 399 being FM stations