- background printing
- background processing
- background program
- background radiation
- background return
- background save
- background sound
- background task
- backhoe
- backing
- backing bar
- backing bead
- backing coat
- backing course
- backing fabric
- backing flange
- backing memory
- backing out
- backing pump
- backing ring
- backing storage
- backing store
- backing strap
- backing strip
- backing up
- backing wire
- backing-off
- backings
- backlash
- backlight
- backlog
- backplane
- backpropping
- backrest
- backrolling
- backscatter
- backscatter peak
- backscattering
- backscattering technique
- backset
- backside
- backsight
- backsight method
- backslash
- backslope
- backspace
- backspace character
- backspace key
- BACKSPACE statement
- backspacing
- backstay
- backstay anchor
- backstay cable
- backtab
- backtracking
- backup
- backup arrangement
- backup bearing
- backup computer
- backup copy
- backup device
- backup disk
- backup diskette
- backup file
- backup media
- backup path
- backup reactor
- backup storage
- backup store
- backup supervisor
- backup volume
- backwall
- backward
- backward channel
- backward counter
- backward derivative
- backward equation
- backward erosion
- backward extrusion
- backward flow
- backward folding
- backward motion
- backward movement
- backward pointer
- backward running
- backward scattering
- backward search
- backward signal
- backward signaling
- backward sort
- backward stroke
- backward substitution
- backward vision
- backward voltage
- backward wave
- backward welding
- backwards
- backwards soring
- backwards welding
- backwash