In this context, "bac" is often a shorthand for a "backup" file or a specific configuration dump used to restore channel lists and server settings. Context: The Era of Satellite "Patching"
A date stamp (October 2, 2016), indicating when this specific firmware patch was released. TГ©lГ©charger 9000HD 99(17261) 02102016 bac
This likely represents the specific software version or build number. In this context, "bac" is often a shorthand