Blair Corporation is one of America's largest direct marketing mail order retailers, selling clothing and household goods. Founded in 1910 as New Process Company by John Leo Blair, the company is celebrating its 100th year in business. Blair is headquartered in Warren, Pennsylvania, and has warehousing and distribution operations in nearby Irvine, Pennsylvania, as well as a call center in Erie, PA. The company is well known for its retail catalogs, which are sent to millions of customers in the United States. While most business is done through mail-order, phone, or online, Blair also maintains retail stores in Warren and Grove City, PA. Blair is the largest employer in Warren County, Pennsylvania, where it is based. Blair employs around 1200 associates.