This article is from the Macintosh system software FAQ, by Elliotte Harold email@example.com with numerous contributions by others.
A/ROSE by any other name would still generate as much pointless
net traffic. Apple's Realtime Operating System Environment is not
needed by 99.9% of the people who stumble across it. It's only
needed if you have an MCP NuBus card of which there were about
six at last count. The only even moderately common one is Apple's
short Ethernet NuBus card. If you don't have such a card, feel
free to trash A/ROSE.