Sarah Allen works with interns Lori Hsu (left) and Fito von Zastrow at the Blazing Cloud offices in San Francisco.
Credit Ramin Rahimian for NPR
Ester Gerston and <a href="http://articles.washingtonpost.com/2009-07-26/news/36783349_1_programmers-first-general-purpose-electronic-computer-daughters">Gloria Ruth Gordon</a>, early programmers working on the ENIAC computer in 1946.
Credit U.S. Army
Sarah Allen, CEO of Blazing Cloud, works with user experience designer Anton Zadorozhnyy in the company's offices in San Francisco.
Sarah Allen has been the only woman on a team of computer programmers a few times in the more than two decades she has worked in the field. Most notably, she led the team — as the lone female programmer — that created Flash video, the dominant technology for streaming video on the Web.
Colorado responded to the mass shootings in Aurora, Colo., and Newtown, Conn., by passing new gun control measures last month. That's not sitting well with several gun-related businesses in the Centennial State, where four companies have announced plans to relocate all or some of their operations.