OK, maybe everyone doesn’t need to know all the picky details about how hard drives work, but this Gizmodo article will give you enough of the basics to have a great understanding of this technology that we rely upon every day. For example, did you know that newer drives store date perpendicular to the platter instead of horizontally? In other words, your data is standing up instead of lying down. (Don’t worry, there’s a cute video that explains it.)

If you’re one of those folks that wants a wireless keyboard for your living room (there’s nothing like couch surfing here’s the one I recommend: The Logitech diNovo Edge. This thing is amazing. I’ve been using mine for more than a year now. First, it’s thin. So thin you just won’t believe it. Second, it’s now available for both PC and Mac. Third, it’s got a built in track pad thus eliminating the need to figure out just how to balance a mouse on the sofa’s arm rest. (However, I just realized that the Mac version doesn’t have this feature. It comes with a mouse instead.) And last, you never need to replace the batteries as it’s got a recharging stand.

Granted it’s a little pricey for a keyboard (~$145 PC, $65 Mac) but in my opinion it’s worth every penny.

Checkout the free IphoneBT.exe program and give it a run. Use it to get a basic idea on how the interface for the iPhone and iPod Touch. You can’t really make calls or surf the web but it will give you an idea of how that darn on-screen keyboard works.

The first is the Arc Mouse.

The revolutionary design of the Arc™ Mouse combines the comfort of a desktop mouse and the portability of a notebook mouse. Arc Mouse folds to 60% of its fully expanded size when you’re on the go. Two color options to match your personal style.

The second are more traditionally shaped mice based their new Blue Track technology.

Microsoft BlueTrack Technology uses advanced optics to generate a more precise image of the surface, allowing it to track more accurately and work on more surfaces.

Are you confused by all these different types of memory cards available today. From compact flash, to SD, to xD to 30-some versions of Sony’s memory sticks there’s a lot of differences to be aware of. For a great yet simple overview check out Gizmodo’s An Illustrated Guide to Every Stupid Memory Card You Need. It is written in Gizmodo’s standard slightly sarcastic style but the information is great.