Thus spake Greg 'groggy' Lehey <grog(a)lemis.com>:
Note that in English, the X is usually pronounced like an S ("zie
niks"). Siemens made a pun on this with their Sinix product; "Sinix"
in German is pronounced the same way as "XENIX" in English :-)
Siemens' computer division is (or was) called Nixdorf...
I always read Sinix as SIemens NIXdorf