Well, I own MOS 2.x and AOS4.x, would you be kind hosting a digital image of the above mentioned OSes in case my CDs fail?
Aside from the size of the images and the resulting bandwidth usage, there's little harm in hosting them.
MOS is freely distributable since it's shareware that needs a paid registration to actually function properly for more than half an hour.
AOS might as well be, since most anyone with hardware capable of running it has already paid for a license.
