Dell PowerVault 775N (Rackmount NAS Appliance) - Manual (Page 104)

ringer equivalence number
RFI
radio frequency interference
RGB
red/green/blue
ROM
read-only memory
rpm
revolutions per minute
RTC
real-time clock
SBE
single bit ECC
SCSI
small computer system interface
sec
second(s)
SEC
single-edge contact
SEL
system event log
SDRAM
synchronous dynamic random-access memory
SIMM
single in-line memory module
SMB
server management bus