U.S. state | Georgia (U.S. state) | Massachusetts Institute of Technology | college football | São Paulo (state) | Secretary of State | Washington (U.S. state) | state | Eton College | University College London | Dartmouth College | United States Department of State | Russian Academy of Sciences | Moscow State University | United States Secretary of State | King's College London | Harvard College | Ohio State University | Michigan State University | California Institute of Technology | New York State Assembly | Trinity College | State Senator | National Academy of Sciences | American Academy of Arts and Sciences | New York State Senate | Rio de Janeiro (state) | college | Louisiana State Legislature | Oberlin College |
It was developed by researchers Dr. Isaac Councill and Dr. C. Lee Giles at the College of Information Sciences and Technology, Pennsylvania State University.