== See also ==* Air launch to orbit* Comparison of orbital launch systems* Hopper (spacecraft)* Orbital airship==References====External links==* Canonical List of Space Transportation and Engineering Methods* Earth-to-Orbit Transportation Bibliography, an extensive publication about novel methods of Earth-to-orbit transport* Orbital Suborbital Program Space Vehicle document* Google Lunar X PRIZE, some commercial initiatives
Agentni sistemi so sistemi, ki vsebujejo inteligentne agente.