And the family of standards for NASA - systems engineering, i.e. not only software development - can be found below (a similar roadmap to ESA ECSS standards can be found here).
https://standards.nasa.gov/nasa-technical-standards (following some links to the standards inside this link might require login)
Quoting:
"Each NASA Technical Standard is assigned to a Technical Discipline. Please select the respective link to access that discipline's standards.
0000 - Documentation and Configuration
1000 - Systems Engineering and Integration, Aerospace Environments, Celestial Mechanics
2000 - Computer Systems, Software, Information Systems
3000 - Human Factors and Health
4000 - Electrical and Electronics Systems, Avionics/Control Systems, Optics
5000 - Structures/Mechanical Systems, Fluid Dynamics, Thermal, Propulsion, Aerodynamics
6000 - Materials and Processes, Parts
7000 - System and Subsystem Test, Analysis, Modeling, Evaluation
8000 - Safety, Quality, Reliability, Maintainability
9000 - Operations, Command, Control, Telemetry/Data Systems, Communications
Any questions on the above standards can be directed to the NTSS Curator at standards@msfc.nasa.gov"
