For some mad reason, a lot of speccy owners had them.
That is because it was one of the only joysticks that would work with the speccy's Kemston interface!
wonder what ST and STE were abbreviations for
ST stood for a very geeky and crappy abbreviation:
ST = Sixteen/Thirtytwo Named as such due to the 68000 working externally on a 16-bit bus, but internally a 32-bit one.
The E in STE stood for Enhanced. Atari tried to update the ST hardware by bolting on some additions the Amiga had since it's start. The biggest additions were a dedicated blitter, 8-bit stereo sound, simm ram sockets and a few other things.