An anon posted another posibility for MOS:
>As revolutionary as newsroom automation systems are, there were a few initial drawbacks – namely the high cost and need to use an all-in-one solution from a single vendor. Fortunately the introduction of the Media Object Server (MOS) protocol changed all this. MOS allows all the various components in a newsroom automation system to work together seamlessly, whether they were all built by the same company or by multiple vendors.