<A HREF="http://www.symbian.com/"
  >Symbian</A>, formerly known as EPOC32, the *(OS) at the heart of <A HREF="http://www.psion.com/"
  >PSION</A> hardware and an increasing number of telephony, telecommunication, PDA, etc. products. A very classical and absolutely uninventive architecture, but that is well respected and stable.
