supercomputer operating system
... that the first Cray-1 was delivered to the customer without a supercomputer operating system?
... that the first <a href="./Cray-1" id="mwDqU" rel="mw:WikiLink" title="Cray-1">Cray-1</a> was delivered to the customer without a <b id="mwDqY"><a class="mw-redirect" href="./Supercomputer_operating_systems" id="mwDqc" rel="mw:WikiLink" title="Supercomputer operating systems">supercomputer operating system</a></b>?