360 The Green and Virtual Data Center
Replication Mirroring of data to a second system or alternate
location
RFID Radio frequency identification tag and reader
RHDD Removal hard disk drive
ROBO Remote office/branch office
RoHS Restriction of hazardous substances
ROI Return on investment
Router Networking or storage device for protocol conver-
sion and routing
RPC Remote Procedure Call for program-to-program
communications
RPO Recovery-point objective—the point to which
data can be restored
RTO Recovery-time objective—when recovered data
will be usable again
RTSP Real-Time Streaming Protocol for streaming data
RU or U Rack unit
RUT Rule of thumb
S/390 IBM mainframe architecture now referred to as
“Z” or “Zed” series
SaaS Software as a service
SAN Storage area ...