SDB meaning in Messaging ?

The Salesians of Don Bosco (SDB), formally known as the Society of Saint Francis de Sales (Latin: Societas Sancti Francisci Salesii), is a religious congregation of men in the Catholic Church, founded in the late 19th century by Italian priest Saint John Bosco to help poor children during the Industrial Revolution. The congregation was named after Saint Francis de Sales, a 17th-century bishop of Geneva.

The Salesians' charter describes the society's mission as "the Christian perfection of its associates obtained by the exercise of spiritual and corporal works of charity towards the young, especially the poor, and the education of boys to the priesthood". Its associated women's institute is the Salesian Sisters of Don Bosco, while the lay movement is the Association of Salesian Cooperators.