Mitchell David Kapor is an American entrepreneur best known for his work as an application developer in the early days of the personal computer software industry, later founding Lotus, where he was instrumental in developing the Lotus 1-2-3 spreadsheet. He left Lotus in 1986. In 1990 with John Perry Barlow and John Gilmore, he co-founded the Electronic Frontier Foundation, and served as its chairman until 1994. In 2003, Kapor became the founding chair of the Mozilla Foundation, creator of the open source web browser Firefox. Kapor has been an investor in the personal computing industry, and supporter of social causes via Kapor Capital and the Kapor Center. Kapor and his wife, Freada Kapor Klein, invest in social impact tech startups that seek to narrow gaps in opportunity and access for underrepresented communities and attempt to eliminate barriers to full participation across the tech ecosystem. Kapor and Klein take a comprehensive approach to removing barriers in education and the workplace for all and fixing the leaks at every stage of the tech pipeline. Kapor serves on the board of SMASH, a non-profit founded by Klein to help underrepresented scholars hone their STEM knowledge while building the networks and skills for careers in tech and the sciences.