[bgammon]

I have no idea what the system is, but it could be something as innocuous as automatic updates. In reality, they probably do send some form of diagnostic information, but since the application is open source, it seems unlikely there would be no way to disable that if it exists.

[joefitzgerald]

https://github.com/atom/metrics#collected-data

Metrics collection can be disabled by the user, and this option is also presented to the user on first load of Atom.