TPSX Web Edition offers 2 main access levels Worldwide Access and U.S. Restricted.
To use TPSX Web Edition all users must first register for Worldwide Access.

1. Worldwide Access
   This option is available for anyone worldwide. It provides basic functions and data access to the TPSX Web Edition.
   Only your name, country, company and valid email address are required. You should receive your registration information via email within minutes of submitting the form. Please follow the instructions in the email message to access the TPSX Web Edition.
   Note: A "Worldwide Access" account with no access for 4 months will be considered inactive and deleted.
2. U.S. Restricted
   This option is available only to U.S. residents. It provides access to all the features of the TPSX Web Edition but some materials/datebases will need an addtional access level. You must provide a complete user profile and sign a non-disclosure agreement. You will be fully registered only after you return the signed agreement to NASA Ames. The approval process unusually takes 2 to 6 weeks.
   Note: A "U.S. Restricted" account with no access for 2 years will be considered inactive and deleted. When the account is deleted the registration letter will be destroyed.

   The "U.S. Restricted" access level can be requested through the "User Options" link after you sign on to TPSX.

3. Other Restricted Levels
   Some Materials and/or Databases are restricted to special groups like NASA or DOD personal.
   After a user has an access level of "U.S. Restricted" they can request access to these items. Please send these requests by email to tpsx-support@asm.arc.nasa.gov.
4. Note On Windows Edition of TPSX
   At this time the windows edition of TPSX has been retired as out of date.