This article explains what IEC 60320 C5, C6, C13, C14, etc. means

Answer:
IEC = The International Electotechnical Commission.

60320 = The numeric designation for a general purpose appliance coupler.

C5 = The designation for a "clover leaf" or "Mickey Mouse" style of end connector on a cable (for Elo, this would be the AC power cable that plugs into a power brick or monitor).

C6 = The designation for a "clover leaf" or "Mickey Mouse" style of input connector on an appliance (for Elo, this would be the AC input on a power brick or monitor).


C13 = The designation for a "kettle" style of end connector on a cable (for Elo, this would be the AC power cable that plugs into a power brick or monitor).

C14 = The designation for a "kettle" style input connector on an applicance (for Elo this would be the AC power input on a power brick or monitor).