RsT is also the name of a compiled hex

Intel HEX

Intel HEX is a file format for conveying binary information for applications like programming microcontrollers, EPROMs, and other kinds of chips. It is one of the oldest file formats available for this purpose, having been in use since the 1970s...

 used on Funcards to allow unauthorized access to cable television

Cable television

Cable television is a system of providing television programs to consumers via radio frequency signals transmitted to televisions through coaxial cables or digital light pulses through fixed optical fibers located on the subscriber's property, much like the over-the-air method used in traditional...

 content. RsT was specifically designed for the main UK cable networks: NTL, Ex-Cw, and TW

TW

TW may refer to:* The Wanted* Tare weight* Terawatt, a unit of power* Taylor Wimpey, the largest British based construction company* Taylor Woodrow, a British based construction company and a subsidiary of Taylor Wimpey...

. The hex is probably the most commonly used amongst enthusiasts and also cable-traders. One downside to this hex is that it does not AU (AutoRoll

Autoroll

Autoroll refers to TV-signal decryption software that automatically updates a video receiver's or DVR/receiver's IDEA keys when the transmitting signal provider changes its block cipher algorithm....

) on key changes.