Answered By: Paul Landers
Last Updated: Jun 10, 2019     Views: 2183

IMPORTANT - An 'R' number and an eRaider each serve a unique purpose and are not interchangeable.


  • An 'R' number is an 8-digit ID automatically issued by the TTU System rather than using your Social Security Number. An example R number would be:  R12345678
  • An eRaider account (username + password) is automatically issued by TTUHSC Information Technology to login to most TTUHSC resources, including online library resources. An example eRaider username would be:  johndoe5
  • A library account is self-service created on an as-needed basis. It is used to track borrowed items such as books, and to track financial transactions for non-free library services such as ILL (interlibrary loan), Document Delivery and 3D printing.