Need help with wiki

Hey everyone!
Does anybody know what optical cartridges are? It seems a lot of sites sell them and I had never heard of them so I looked it up in wiki. Couldn't find much until I found Magneto Optical disks/cartridges. Apparently, these things combine the best of hard disk drives and of DVDs/CDs since they look a lot like hard disks and work like them too except the read/write process is far more akin too the CD/DVD's read/write process. However they are a bit pricey and their capacity is not too impressive since HD-DVDs and Blu-Ray DVDs emerged...

But anyway, you can check some of them out by clicking here...

Alright then...Later...