Modern hub-and-spoke system (circa 1995)
<a href="https://en.wikipedia.org/wiki/User:Elwood64151" class="extiw" title="en:User:Elwood64151">en:User:Elwood64151</a>, <a href="//commons.wikimedia.org/wiki/User:Stannered" title="User:Stannered">User:Stannered</a>
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<a href="https://en.wikipedia.org/wiki/Image:Airline_hub-1995.jpg" class="extiw" title="en:Image:Airline hub-1995.jpg">en:Image:Airline hub-1995.jpg</a>