From The Collaborative International Dictionary of English v.0.48 [gcide]:
Gif \Gif\, conj. [AS. See If.]
If. [Obs.]
[1913 Webster]
Note: Gif is the old form of if, and frequently occurs in the
earlier English writers. See If.
[1913 Webster]
From The Collaborative International Dictionary of English v.0.48 [gcide]:
GIF \GIF\, n. [Acronym from Graphics Interchange Format.]
(Computers)
1. The Graphics Interchange Format, one of the most popular
standardized formats for storing graphic data in binary
computer files. The standard has been revised several
times, and includes provisions for interlacing and
animating images. Its disadvantage is that it can store
only 256 colors. Compare JPEG.
[PJC]
2. (Computers) An image stored in GIF[1] format, or the file
in which the image is stored; as, he sent three GIF's with
lovely pictures of his children.
[PJC]
From The Free On-line Dictionary of Computing (19 Sep 2003) [foldoc]:
GIF
Graphics Interchange Format