department during a time when AT&T was selling its own laptops and other computer systems. By early 1991, 65 percent of the computer systems supplied to Fortune 500 companies had AST as OEM. As with many other computer companies, AST struggled in 1992 due to a fierce price war started by Compaq. During plans to restructure AST yet again to minimize operating costs, Yuen left the company early that year, leaving Qureshey as the sole remaining co-founder. Qureshey and his executive board set out to maintain AST's third-place status and keep on top of developments in the computer industry. In November 1992, the company introduced the PowerExec 4/25SL Color Plus, one of the first laptops with the portable-specific 80486SL processor. It was released shortly after Compaq released the LTE Lite 4/25C, which is the first laptop with an i486SL. In 1993, AST announced a joint venture with Grid Systems, a subsidiary of Tandy Corporation, to develop a pen-tablet computer called the PenExec, which has a cordless stylus. In mid-1993, AST acquired both Grid Systems and Tandy's computer division for $105 million. The company incurred a loss with this purchase but gained four PC manufacturing plants—one in Scotland, the rest in Texas—and a litany of patents and software copyrights that had been registered to Tandy Corporation. The Scotland plant was later shut down, to afford building another factory in Ireland, and by 1995 only one of the Texas plants remained operational. In January 1994, AST announced its agreement to sell PenRight and FieldNet—pen-based software development tools included in AST's previous acquisition of Grid and Tandy—to the Telxon Corporation. The deal was finalized in April that year. Decline and sale (1994–2001) By the mid-1990s, AST had severe problems in the highly competitive PC market. According to The New York Times, AST's prospect shrunk due to the strategy of offering premium models in an increasingly competitive personal computer market, while Compaq and other top manufacturers slashed prices in direct competition with the cheapest clones. Revenues for 1996 were $2.1 billion, down from 1995 revenues of over $2.3 billion. In 1997, AST Research was wholly acquired by Samsung. At the time, Samsung owned 46 percent of AST and had offered to buy the remaining common shares. Prior to this move, Samsung had already owned a substantial stake and provided considerable financial support to keep AST going. By December, the number of employees was down