AtGoogleTalks (or @Google Talks or Talks@Google) is a series of presentations by invited speakers sponsored by Google given at various Google offices throughout the world. The series has feature categories such as Authors@Google, Candidates@Google, Women@Google, Musicians@Google and others. For technical topics, there is Google Tech Talks (also known as EngEDU) which is dedicated to exploring areas of technology and science. Guest speakers range from present and past world leaders to little-known poets and artists. Talks range from about 40 to 70 minutes. As of February 2009 there had been over 1700 guest speakers. In March 2006, Google announced that videos of the talks would be available on Google Video. Most are now put on YouTube before they are put on Google Videos. Several talks are available from to slashdot, Digg, and other aggregation sites.