San Salvador is home to the great majority of corporations in the country, and supports many commercial activities, including food and beverage production; the pharmaceutical and chemical industries; the sale of automobiles, handicrafts, and construction materials; as well as appliance repair. Most national companies have their headquarters in San Salvador, which is also home to regional offices for various transnational entities. Unicomer Group, Almacenes Simán, Grupo Roble, Grupo Real, Excel Automotríz, and Grupo Q all have their central offices in San Salvador. Since the early 2010s there has been a boom in the construction of call centers providing services to national and international companies alike.