Cambridge CAP
... that the Cambridge CAP was the first successful experimental computer that demonstrated the use of capabilities, both in hardware and software?
... that the <b id="mwE44"><a href="./CAP_computer" id="mwE48" rel="mw:WikiLink" title="CAP computer">Cambridge CAP</a></b> <i id="mwE5A">(pictured)</i> was the first successful experimental computer that demonstrated the use of <a href="./Capability-based_security" id="mwE5E" rel="mw:WikiLink" title="Capability-based security">capabilities</a>, both in hardware and software?