and affiliates over and above all considerations, including its proposal to acquire HP." On March 31, 2020, Xerox abolished its $24 a share offer. In September 2020, Xerox opened its North Carolina Center of Excellence in Cary, North Carolina. The Center includes the research and development operations, the 3-D printing lab, and th eXerox Digital eXperience IT organization. In September 2021, Xerox announced it was transferring its stock ticker from the New York Stock Exchange to the Nasdaq after 60 years. The move, as described by Visentin, was to "[challenge] the status quo by developing and leveraging new innovations to create solutions that address major secular challenges across industries", and was viewed as part of Xerox's transition into software. The transfer went into effect on September 21, 2021. Digital printing The laser printer was invented in 1969 by Xerox researcher Gary Starkweather by modifying a Xerox 7000 copier. Xerox management was afraid the product version of Starkweather's invention, which became the 9700, would negatively impact their copier business so the innovation sat in limbo until IBM launched the 3800 laser printer in 1976. The first commercial non-impact printer was the Xerox 1200, introduced in 1973, based on the 3600 copier. It had an optical character generator designed by optical engineer Phil Chen. In 1977, following IBM's laser printer introduction, the Xerox 9700 was introduced. Laser printing eventually became a multibillion-dollar business for Xerox. In the late 1970s, Xerox introduced the "Xerox 350 color slide system." This product allowed the customer to create digital word and graphic 35-millimetre slides. Many of the concepts used in today's "Photo Shop" programs were pioneered with this technology. In 1980, Xerox announced the 5700 laser printing system, a much smaller version of their 9700, but with revolutionary touch-screen capabilities and multiple media input (word processing disks, IBM magcards, etc.) and printer 'finishing' options. This product was allegedly never intended to make the commercial markets due to its development cost, but rather to show the innovation of Xerox. It took off with many customers, but was soon replaced with its smaller and lower cost Xerox 2700 Distributed Electronic Printer offering in 1982. Palo Alto Research Center In 1970, under company president C. Peter McColough, Xerox opened the Xerox Palo Alto Research Center, known as Xerox PARC. The facility developed many modern computing technologies such as the graphical user interface (GUI), laser printing, WYSIWYG text editors and