 WIAC officially began operations in March 1947 moving to the current frequency, 740 AM, replacing WIBS in Santurce.During the 1950s & 1970s, WIAC was the only radio station broadcasting weather forecasts every 10 minutes & public affairs programming.In 1961, Bestov Broadcasting, Inc. (a radio company owned by Alan Mejía and his brother, Luis Mejía) acquired the station, along with WIAC-FM 102.5 FM (formerly Sistema 102), which began operations that same year.