Operator YAPO (Yet Another Portable Opera) is a portable version of the Opera web browser. It can be installed on portable data storage devices like pendrives, USB sticks and hard drives.
Operator YAPO used to be known as OperaTor, a software bundle that consisted of Opera, Tor and Polipo. Its aim was to provide a way to surf the web anonymously. OperaTor only anonymized HTTP and HTTPS traffic. Other protocols like BitTorrent or the complete part of Opera Mail would not be anonymized.
Following the projects new name change, Operator YAPO no longer supports Tor. Older versions of OperaTor are still available however, but are no longer maintained.