Robot sessions outnumber human sessions 10:1 in the Internet Archive. The study analyzed over 2 million requests from the Internet Archive's Wayback Machine logs from February 2012. Results showed that robots accounted for 50.1% of raw requests, 93% of filtered requests, 90.9% of sessions, and 80% of data transferred, compared to 40.5%, 7%, 9.1%, and 20% for humans respectively. Robots mainly exhibited "Dip" and "Skim" access patterns and accessed TimeMaps, while humans exhibited "Dip" and "Dive" patterns and mainly accessed archived pages rather than TimeMaps.