radian
raid
RAM
random
random access method
random algorithm
random error
ras
rate
rdbms
reachable
reactivation
read
read aborted
read device
read options
read process
readable
read-access time
reader
read-error
read-only
read-only storage
read-only terminal
read-only text
read-write head
real
real time
real-time data processing
real-time output
real-time processing
real-time program
real-time programming
real-time system
real-time testing
reboot
recalculation
receiver
recently used
recharge the batteries
recipient
record
recording
recover
reding data track
redirect
redundance
redundancy
redundancy check
redundant
redundant code
reel
reflecting software
reflection
reformat
refresh
refresh memory
refresh rate
regenerator
register
register addressing
register capacity
registered
registration
registration card