Coopers & Lybrand was a global professional services firm that provided audit, tax, and consulting services. Founded in 1957 through the merger of Coopers & Lybrand and Lybrand, Ross Bros. & Montgomery, it became one of the largest accounting firms in the world. The firm was known for its expertise in various industries and played a significant role in shaping accounting practices. In 1998, Coopers & Lybrand merged with Price Waterhouse to form PricewaterhouseCoopers (PwC), one of the "Big Four" accounting firms. This merger expanded their global reach and service offerings, allowing them to better serve clients in an increasingly complex business environment.