The Sept. 27 launch of Dot Diva, a new initiative co-sponsored by WGBH to get young Massachusetts women interested in computing, is already sold out. The kickoff will be at the Microsoft New England Research & Development Center in Cambridge and feature an interactive fashion show, tech music demos, an “Artbotics” art installation and local college fair. It’s funded by a grant from the National Science Foundation (NSF) to increase the number of college-bound girls studying for a career in computer science. Women are still underrepresented in the field, according to WGBH. The station, along with co-sponsors ACM (the Association for Computing Machinery), NCWIT (the National Center for Women & Information Technology), conducted a national online survey of more than 1,400 college-bound high school students, ages 13-17; that research indicated a significant gender gap in attitudes toward computer science.