The core Flight System (cFS) is a platform and project independent reusable flight software framework and set of reusable software applications.    Use of OS and platforms makes it easy to port to multiple OS and applications.   

​

The CFS uses NASA best practices and architectures developed over 20+ flight missions.   A versions of CFS has been Class A (manned flight) certified.    A version of the CFS has been open sourced.    To obtain see opensat details below.
 

​

There is an open source and a non open version.    The open source version can be downloaded from the link below.   Any US entity can get the internal NASA version.

​

​

NASA has flown this on 20+ flight missions.

​

NASA 7150.2 Class A certification is for VxWorks and SPARC Architecture