HASL Views 7 meanings found HASL most often stands for hot air solder leveling, a common surface finish for printed circuit boards, while the same letters represent various professional groups such as the Hawaii Association of School Librarians. Community Hamilton Art Student League Handicapped Awareness Support League Academic & Science Hot Air Solder Leveling Hybrid Anaerobic Solid Liquid Computing High Assurance Software Laboratory Business Hawaii Association of School Librarians Sports Huntsville Adult Soccer League