# Stratosphère
Stratosphère provides customization of the Horizon OS at the system level. This includes a reimplementation of several system modules and additional, custom system modules that extend or add a variety of features.
## Modules
The modules currently provided by Stratosphère are:
+ [ams_mitm](modules/ams_mitm.md)
+ [boot](modules/boot.md)
+ [boot2](modules/boot2.md)
+ [creport](modules/creport.md)
+ [dmnt](modules/dmnt.md)
+ [eclct.stub](modules/eclct.stub.md)
+ [erpt](modules/erpt.md)
+ [fatal](modules/fatal.md)
+ [jpegdec](modules/jpegdec.md)
+ [loader](modules/loader.md)
+ [ncm](modules/ncm.md)
+ [pgl](modules/pgl.md)
+ [pm](modules/pm.md)
+ [ro](modules/ro.md)
+ [sm](modules/sm.md)
+ [spl](modules/spl.md)
