Backbone International Limited · Backbone Petrochem Private Limited · Backbone Power Private Limited · Backbone India Limited · Backbone Infotech Private Limited · Backbone Corporation Limited · Backbone E Learning Private Limited · Shye Quantum Impex Private Limited · Backbone Construction Private Limited · Backbone Quarry & Minerals Private Limited · Backbone Shipyard & Marine Private Limited · Quantum Z Plus Detective & Armed Squad Private Limited · Backbone Architects & Consultants Private Limited · Backbone Entertainment Private Limited · L45200 Mh2006 Plc158617