This below link provides real good explanations to the important safety standards, agencies, and marks in the power supply industry, covering: 

IEC 60950: Safety of Information Technology Equipment

IEC 60065: Safety of Audio, Video and Similar Electronic Apparatus

IEC 62386-1: Audio/Video, Information and Communication Technology Equipment

IEC 60601-1: Safety of Medical Electrical Equipment

IEC 61010-1: Safety of Measurement, Control and Laboratory Equipment

UL 1310: Safety Requirement for Class 2 Power Units

UL 60079: Explosive Atmospheres