Firefox, Android, Chrome, WordPress, Apache, Linux: all of this software you use every day is open source. But what is open source software? What do open source licenses really mean? Why would anyone open source their work? How do they make money? Why should you contribute? Gina Trapani (lead developer of open source webapp ThinkUp http://thinkupapp.com) will cover the basics of OSS, what's important about it, and how you can use it to your best advantage. Gina will follow up with a Q&A. She'll also have copies of the new edition of the Lifehacker book on hand to sign (http://lifehackerbook.com).