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R
radio frequency identification [RFID]
random access memory [RAM]
rapid application development [RAD]
raw data
read-only memory [ROM]
ready-made software
recognized certificate
recognized certification authority
record type
recovery
redundancy
Redundant Array of Independent Disk [RAID]
redundant code
relational database
relational database management system [RDBMS]
relational language
relational model
relational structure
remote operation
remote procedure call [RPC]
remote site
remote terminal
removable hard disk
repeater
resilience
resolution
resources estimation
response time
restart
rewritable optical disk drive
rich media
rich text format [RTF]
right-sizing
risk analysis
risk assessment
risk management
robotic device
robotics
rollfilm reader
root directory
root server system
router
routine [procedure]
routine [program]