Visa, MasterCard (MC) and JCB cards are the most widely accepted credit cards in Cambodia. AMEX is coming into wider use, as well as the new ANZ Bluespot card. Diners Club (DC) is accepted at very few place.
Microaggression is a term which some use to refer to unintended discrimination. Psychiatrist and Harvard University professor Chester M. Pierce coined the word microaggression in 1970 to describe insults and dismissals he said he had regularly witnessed non-black Americans inflict on African Americans.
I was reading an interesting article in The Atlantic that claims that the tools of campus protestors are being used against them, referring the concepts of psychological offense, and other events that would be called micro aggressions or harassment by modern protestors.