<P> The Microsoft campus is the informal name of Microsoft's corporate headquarters, located at One Microsoft Way in Redmond, Washington . Microsoft initially moved onto the grounds of the campus on February 26, 1986, weeks before the company went public on March 13 . The headquarters has experienced multiple expansions since its establishment . </P> <P> It is estimated to encompass over 8 million square feet (740,000 m) of office space and 30,000--40,000 employees . Additional offices on the Eastside area of the Seattle metropolitan area are located in Bellevue and Issaquah . Building 92 on the campus contains a visitor center (with interactive exhibits) and store that are open to the public . </P> <P> Microsoft chose to move its headquarters from Bellevue to nearby Redmond in January 1985, selecting a 29 - acre (12 ha) plot of land that would be developed by Wright Runstad & Company . Construction began on August 9, and Microsoft moved into the $25 million facility on February 26, 1986, several weeks before the company's initial public offering . The move generated some concerns about increased traffic congestion on the unfinished State Route 520 freeway between Bellevue and Redmond; a new freeway interchange at Northeast 40th Street would later be built in 2000 to service the campus, after lobbying and partial funding from Microsoft . The initial campus was on a 30 - acre (12 ha) lot with six buildings, and was able to accommodate 800 employees but eventually grew to 1,400 by 1988 . The campus was originally leased to Microsoft from the Teachers Insurance and Annuity Association, a pension fund manager, until it was bought back in 1992 . </P> <P> The first major expansion of the campus came in 1992, bringing the total amount of office space to 1.7 million square feet (160,000 m) on 260 acres (110 ha) of land . Microsoft also announced its intention to contain most of its future growth within Redmond, while retaining some offices in Downtown Bellevue and Factoria . </P>

Microsoft headquarters is in which of the following cities