The GIF (Graphics Interchange Format), pronounced “JIF”, was designed by CompuServe and the official specification released in June of 1987.
The pronunciation of “GIF” is specified in the GIF specification to be “jif”, as in “jiffy”, rather then “gif”, which most people seem to prefer. This does seem strange because the “G” is from the word “Graphics” and not “Jraphics”.
some pronounce it with a soft G like giraffe, some with a hard G like gift, and no one really knows what they’re talking about. (For the record, the soft G is correct; it is how the author of the format pronounces it.)
the creator of GIF (Steve Wilhite)always pronounced it “jiff” and would correct those who pronounced it with a hard G. “Choosy developers choose GIF” (spinning off of a historically popular peanut butter commercial).