In university, Karim served an Internship at Silicon Graphics, Inc., where he worked on 3D voxel data management for very large data sets for volume rendering, including the data for the Visible Human Project. While working at PayPal in 2002, he met Chad Hurley and Steve Chen. Three years later, in 2005, they founded the video-sharing website YouTube. Karim created the first channel on YouTube, "jawed", on April 23, 2005 PDT , and uploaded the website's first video, "Me at the zoo", the same day.
