A European format for digital transmission. E1 supports signals at 2 Mbps (32 channels at 64Kbps, with 2 channels reserved for signaling and controlling), versus the T1, which carries signals at 1.544 Mbps (24 channels at 64Kbps).
Frequently used passwords can be stored by Windows, for instance, Outlook Express email access or for a FTP (File Transport protocol) connection. Once you are not required to enter them over and over manually, these words just are being forgotten.