Gif Animation

The feature of storing multiple images in one file, accompanied by control data, is used extensively on the Web to produce simple animations. The optional interlacing feature, which stores image scan lines out of order in such a fashion that even a partially downloaded image was somewhat recognizable, also helped GIF's popularity, as a user could abort the download if it was not what was required.
Pronunciation
The creators of the format pronounced GIF with a soft "G", /ˈdʒɪf/, as in "gin". An alternative pronunciation uses a hard "G", /ˈɡɪf/, as in "graphics", reflecting the expanded acronym. Both pronunciations are given as correct by the Oxford English Dictionary and the American Heritage Dictionary.