switched to a magnetic tape off-line technique. In 1962, Lyons Computers Ltd. placed an order for use with their LEO III computer, and the printer was delivered in 1964. It printed 2,888 lines per minute, slower than the target of 5,000 lpm. 1960s In the 1960s, Xerox held a dominant position in the photocopier market. In 1960, a xerography research facility called the Wilson Center for Research and Technology was opened in Webster, New York. In 1961, the company changed its name to Xerox Corporation. Xerox common stock (XRX) was listed on the New York Stock Exchange in 1961 and on the Chicago Stock Exchange in 1990. In 1963, Xerox introduced the Xerox 813, the first desktop plain-paper copier, realizing Carlson's vision of a copier that could fit on anyone's office desk. Ten years later, in 1973, a basic, analogue, color copier, based on the 914, followed. The 914 itself was gradually sped up to become the 420 and 720. The 813 was similarly developed into the 330 and 660 products and, eventually, also the 740 desktop microfiche printer. Xerox's first foray into duplicating, as distinct from copying, was with the Xerox 2400, introduced in 1966. The model number denoted the number of prints produced in an hour. Although not as fast as offset printing, this machine introduced the industry's first automatic document feeder, paper slitter and perforator, and collator (sorter). This product was soon sped up by fifty percent to become the Xerox 3600 Duplicator. Meanwhile, a small lab team was borrowing 914 copiers and modifying them. The lab was developing what it called long distance xerography (LDX) to connect two copiers using the public telephone network, so that a document scanned on one machine would print out on the other. The LDX system was introduced in 1964. Many years later, this work came to fruition in the Xerox telecopiers, seminal to today's fax machines. The fax operation in today's multifunction copiers is true to Carlson's original vision for these devices. In 1968, C. Peter McColough, a longtime executive of Haloid and Xerox, became Xerox's CEO. The same year, the company consolidated its headquarters at Xerox Square in downtown Rochester, New York, with its 30-story Xerox Tower. Xerox embarked on a series of acquisitions. It purchased University Microfilms International in 1962, Electro-Optical Systems in 1963, and R. R. Bowker in 1967. In 1969, Xerox acquired Scientific Data Systems (SDS),