What does QES stand for?

Ancash Sihuas Quechua - Language code (ETLW)

Quadrant Eleventh-Gram Second

Quaker Esperanto Society (EA)

Quality Education System (SAUS)

Quantized Electronic Structure (UWER)

Quasi-Elastic Scattering (UWER)

Queen's English Society - United Kingdom (EAIO)

Qwam E-content Server