NFT.... Nutrient Film Technique.....plants grown in tubes with a ' little' water trickling through them 'continuousally'.
Note: the system's water, can 'quickly' get hot in the summer time, due to the small amount of water flowing in the tubes. Also, quickly cool in the winter.
DWC.. Deep Water Culture....plants growing in a (styrofoam) raft, floating on water, usually 'at least' 12 inches deep.
Note: need added areation in the water. Water flow is also 'continuous'.
Special note: learning should be ' continuous '.... :-)