CONTENTS

Introduction
3/5 minute oscillations
Transition region waves/oscillations
  Transition region structure
  Reflection due the temperature gradient
  Interaction with the Transition Region
  Phase delays
  Transition region redshifts i
  Transition region redshifts ii
  Upper transition region (blue)shifts
  Network vs Internetwork velocities
  Coronal driving
  Network line profiles
  A three component transition region?
  High frequency variations
  Transition region summary
Conclusions