Some computer systems store user passwords as plaintext, against which to compare user logon attempts. SAP Logon Tickets represent user credentials in SAP systems. This allowed multiple users to logon and execute applications on a WinFrame server. Samba can also provide user logon scripts and group policy implementation through poledit. Passwords are not required from the family members during logon. Some proxy servers implement a logon requirement. Neptune introduced a logon screen similar to that later used in Windows XP. There is no local logon or Remote Desktop support. Hydra is a parallelized network logon cracker. In the frequency domain they may be named kernel, logon, and frame, among others. SAP NetWeaver PI allows for Single Sign-On through SAP Logon Tickets and x.509 certificates. Administratively, it is part of the peninsular barangay of Logon, Daanbantayan, Cebu. The Logon or Logone River is a major tributary of the Chari River.