Few people have heard of it, yet many consider John Blankenbaker's KENBAK-1 to be the first commercial personal computer.

Koss introduced these headphones over 40 years ago, and they remain affordable favorites to this day.

3D Movies On DVD: Is Anybody Watching?


Believe it or not, some 3D video technology is surprisingly affordable. Still, when most people think of 3D movies, they often recall cheap little cardboard glasses with 2-color lenses (typically red and bluish-green). These anaglyphic images were embarrassingly popular in the early 1950s, although some modern films have also been released in this format. Color reproduction was dismal, and the bizarre cardboard glasses definitely aren't designed for rest comfortably on human faces. A succession of increasingly optimistic mad scientists created ever more complex 3D viewing systems, including polarized projection systems (expensive and difficult to maintain) and shutter glasses (which must be electronically synchronized to the screen action).

As far as the mad scientists are concerned, it is only a matter of time before 3D leaps into living rooms around the world. Alas, there really isn't strong demand for 3D content at home because most of us are still trying to figure out how to get high-def content out of our newfangled flat screen TVs (heck, I'm still trying to find all of the remotes). Still, the loonies in the R&D labs keep pushing. And they've succeeded, to a certain extent.

A number of companies offer very inexpensive shutter glasses, usually bundled with a variety of short films such as Up Denali 3D on DVD. Unfortunately, these shutter systems have several significant drawbacks: They only work with CRT televisions (LCD and Plasma screens do not refresh in the same manner) and the screen refresh rate of standard television isn't high enough to avoid visible flicker. They're interesting novelty items, but the problem is that there just isn't a broad enough range of 3D content to support the fledgling industry. After all, there's a limit to how many times your family will be willing to watch IMAX nature films while wearing goofy plastic goggles.

3D Stereo Technology: Ready for Prime Time? [Tom's Hardware]

3D Bolex Movie Camera


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