To the experienced programmers out there, the subject of this article will be immediately apparent. To others who are a bit more … excitable, it may seem rather risque. To those who watch a lot of television, it may simply be a reference to a certain warehouse retailer (I won’t bother giving them a Google boost). But, there are those of us who don’t have Computer Science degrees, and have never been told what the Big O notation is, and the Wikipedia article isn’t much help unless you’re a mathematician (I’m not). Thankfully, I finally had a big “Oh!” about the Big O, and I thought I’d share how I see it, for those of you who may not get what everybody’s talking about.