A selfie is a type of self-portrait photograph, typically taken with a hand-held digital camera or camera phone. In August 2013, the term selfie also made its debut in Oxford Dictionaries Online's quarterly update where it is defined as "a photograph that one has taken of oneself, typically one taken with a smartphone or webcam and uploaded to a social media website." Selfies are often associated with social networking and photo sharing services such as Twitter, Facebook, Instagram, and Snapchat where they are commonly posted or sent. They are often casual, are typically taken either with a camera held at arm's length or in a mirror, and typically include either only the photographer, or the photographer and as many people as can be in focus. Selfies taken that involve multiple people are known as "group selfies". In August 2013 the Guardian produced a film series titled Thinkfluencer exploring selfie exposure in the UK.