of the company's orders being war-related. Wartime orders were centered on two broad lines of products – industrial controls to speed production and electrical components or "radio parts" used in a wide range of military equipment. Allen-Bradley expanded its facilities numerous times during the 1940s to meet war-time production needs. With Fred Loock serving as president and Harry Bradley as chairman, the company began a major $1 million, two-year expansion project in 1947. The company completed additional expansions at its Milwaukee facilities in the 1950s and 1960s, including the Allen-Bradley clock tower. The clock tower has since been renamed and is known today as the Rockwell Automation clock tower. Harry Bradley died in 1965. Fred Loock retired in 1967 and died in 1973. During the 1970s, the company expanded its production facilities and markets and entered the 1980s as a global company. With president J. Tracy O'Rourke (1981–89) at the helm, the company introduced a new line of programmable logic controllers, the PLC in 1981 followed by the PLC-2 1982) (2/30, 2/05/ 2/16&2/17) PLC-3(1982) SLC-100 Family (1986) SLC-500(1986) PLC-5 Family (1985). Earlier PLC developments were the MAC, PLC-4. In 1985 privately owned Allen-Bradley set a new fiscal record with sales of $1 billion. On February 20, 1985, Rockwell International purchased Allen-Bradley for $1.651 billion; this was the largest acquisition in Wisconsin's history to date. The 1990s featured continued technology development, including the company's launch of its software business, Rockwell Software (1994), the Logix control platform (1997) and the Integrated Architecture system (1999). Rockwell International developed PowerFlex, a manufacturing software and technology in the 1990s. During this decade, Rockwell International also acquired a power systems business, composed of Reliance Electric and Dodge. These two brands, combined with control systems brands Allen-Bradley and Rockwell Software, were marketed as Rockwell Automation. In 1998, Keith Nosbusch was named president of Rockwell Automation Control Systems. Rockwell International Corporation headquarters was moved to Milwaukee, Wisconsin the same year. 21st century In 2001, Rockwell International split into two companies. The industrial automation division became Rockwell Automation, while the avionics division became Rockwell Collins. The split was structured so that Rockwell Automation was the legal successor of Rockwell International, while Rockwell Collins was the spin-off. Rockwell Automation retains Rockwell International's stock price history and continues to trade on the New York Stock Exchange under the symbol "ROK". Keith Nosbusch was named chief executive officer in 2004. In 2007,