Tim Draper is the creator of "viral marketing." His use of "viral marketing" in web-based e-mail to geometrically spread an Internet product was instrumental to the success of Hotmail and Yahoo! Mail, and has been adopted as a standard marketing technique to hundreds of businesses. Draper invested in and contributed to the development of Skype (acquired by eBay then by Microsoft), Baidu, Overture (acquired by Yahoo!), Parametric Technology, Hotmail (acquired by Microsoft), Tumbleweed Communications, PLX Technologies, Digidesign (acquired by Avid), Preview Travel (acquired by Travelocity), Four11 (acquired by Yahoo!), Combinet (acquired by Cisco), and Redgate (acquired by AOL), among others. Draper launched the DFJ Global Network, an international network of venture capital funds in more than thirty cities around the globe. Draper is Founder and Chair Emeritus for The BizWorld Foundation that teach children about business, entrepreneurship and finance in the US and around the world.