The two-engine A330 and the four-engine A340 were both developed and launched together at the Paris Airshow in June 1987. The A330 entered service in January 1994 and has been a popular corporate aircraft ever since. In 2011, the VIP version of the A330 was rebranded as the ACJ330. Private owners prefer the ACJ330 due to its seamless integration with mainstream commercial airline traffic both for straightforward service support as well as potential anonymity. If desired, ACJ330's can inconspicuously blend right in at major airports. The VIP version adds great possibilities for government heads of state, corporate executives, or those who simply enjoy unrivaled levels of luxury and service. This luxury edition of the A330 is becoming more and more in-demand and in turn, Airbus has been continually marketing the VIP version as an alternative to the default configuration. As a result, the ACJ330 is now one of the best VIP airliner options for travelers who require a massive amount of space or passenger capacity.