You will need a four-character transaction identification to sign on to the Atos system. The Security Record Maintenance (SSSR) allows one person to control all sign-ons to the systems. To access this transaction, a special sign-on, SECURITY SUPERVISOR, must be used. The initial password for the Security Sign-on (SSSN) screen is INITIALIZE. After this information is entered, you will be prompted to enter a new password (to be used thereafter). The Security Supervisor uses this transaction to control the Security Master File (which contains your sign-ons) and user access to the on-line transactions.