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President Barack Obama, as you might have heard, did a town hall thing on Tumblr this week. In the process he met Tumblr founder David Karp and they, it seems, did a fist-bump of which a gif was created. Except when the president mentioned it, he did so mistakenly. 

Here at Marketplace, we've already settled the burning question of how you pronounce these three little letters: G I F.

The guy who invented the graphics interchange format, which lets images on your computer screen move, kind of like animation, got a Webby lifetime achievement award in May of 2013.

Steve Wilhite is his name. He's had a stroke, so he can't speak. But you can check out the video of his acceptance presentation last night, in which he laid down the law.

It's 'jif,' people, like the peanut butter.  Speaking of which, even the peanut butter maker got in on the debate.

Follow Kai Ryssdal at @kairyssdal