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Model done in Maya 2008

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'That's the Atmosphere Processor?'

'Yep, that's it. Remarkable piece of machinery, completely automated. You know, we manufacture those, by the way.' Ripley and Burke, regarding the APP on LV-426 (from Aliens)

The Atmosphere Processing Plant also known as the Atmosphere Processor (AP), Atmospheric Processor or Atmos, is a large automated reactor capable of 'converting' an unbreathable, toxic or otherwise inhospitable atmosphere into one suitable for human habitation. Atmosphere Processors are a key component of extrasolar colonisation efforts. The technology was pioneered by Weyland Corp in the first half of the 21st century[4] and was later developed and refined by the Weyland-Yutani Corporation.

While the conversion process is entirely automated, a constant crew is required to oversee an APP's maintenance. Often an entire colony will be established for this very purpose, such as Hadley's Hope on Acheron (LV-426).

Technical specifications

Height 1,500 meters Power plant 1.0 terawatt fusion reactor Crew Variable Usage Role(s) Terraforming device Counterpart(s) Atmosphere Pressurizer Era(s) 21st century 22nd century