Here are some of the key milestones in Microsoft's history:

• Founded: Microsoft was founded by Bill Gates and Paul Allen on April 4, 1975.
• Headquarters Move: The company moved from New Mexico to Washington on January 1, 1979.
• IPO: Microsoft's stock went public on March 13, 1986.
• Microsoft Office: The earliest version of the Office suite of productivity applications was introduced on August 1, 1989.
• Windows 3.0: Microsoft launched Windows 3.0 on May 22, 1990.
• Leadership Change: Steve Ballmer was named president and CEO on January 13, 2000.
• Xbox Launch: The Xbox was launched on November 15, 2001.
• Microsoft Surface: The Microsoft Surface was launched on October 26, 2012.
• CEO Appointment: Satya Nadella became the CEO on February 4, 2014.
• LinkedIn Acquisition: Microsoft completed the acquisition of LinkedIn on December 8, 2016.
• OpenAI Partnership: Microsoft extended its partnership with OpenAI on January 18, 2023.
• Microsoft Copilot Announcement: Microsoft announced Microsoft Copilot, an everyday AI companion, on September 21, 2023.

Microsoft introduced the earliest version of its Office suite of productivity applications on August 1, 1989.

Microsoft was founded by Bill Gates and Paul Allen on April 4, 1975.

Microsoft Copilot is described as your everyday AI companion. It was announced by Microsoft on September 21, 2023.

Microsoft completed its acquisition of LinkedIn on December 8, 2016.