http://grammarist.com/usage/perk-vs-perq/ http://grammarist.com/usage/perk-vs-perq/ "The accepted spelling for the abbreviation of perquisite is perk, usually

http://grammarist.com/usage/perk-vs-perq/ http://grammarist.com/usage/perk-vs-perq/ "The accepted spelling for the abbreviation of perquisite is perk, usually rendered as the plural, perks."