A selfie is a self-portrait photograph, typically taken with a digital camera or camera phone held in the hand or supported by a selfie stick. Selfies are often shared on social networking services such as Facebook, Instagram and Twitter. They are usually flattering and made to appear casual. Most selfies are taken with a camera held at arms length or pointed at a mirror, rather than by using a self-timer. A selfie stick may be used to widen the angle of view, such as for group selfies.
Robert Cornelius, an American pioneer in photography, produced a daguerreotype of himself in 1839 which is also one of the first photographs of a person. Because the process was slow he was able to uncover the lens, run into the shot for a minute or more, and then replace the lens cap. He recorded on the back The first light Picture ever taken. 1839.
Woman taking her picture in a mirror, ca 1900.
The debut of the portable Kodak Brownie box camera in 1900 led to photographic self-portraiture becoming a more widespread technique. The method was usually by mirror and stabilizing the camera either on a nearby object or on a tripod while framing via a viewfinder at the top of the box. Russian Grand Duchess Anastasia Nikolaevna at the age of 13 was one of the first teenagers to take her own picture using a mirror to send to a friend in 1914. In the letter that accompanied the photograph, she wrote, I took this picture of myself looking at the mirror. It was very hard as my hands were trembling. (source : wikipedia)