Re:last post
Megatraveller had interrupts, but I'm not sure that 2300 had them...
(As Traveller:2300 a/k/a 2300AD was based on Twilight 2000, it's probably very unlikely, although if GDW had survived bankruptcy, they would have eventually had a common game system, based in part on second edition Paranoia (task determination would have been based on rolling under a TN using a D20)).