TextboxList turns normal textboxes into a widget which can be navigated with the keyboard, effectively turning your input into a “list” of items that can be easily deleted. It comes with an Autocomplete plugin.
A. Ravenscroft, and R. Pilkington. International Journal of Artificial Intelligence in Education: Special Issue on Analysing Educational Dialogue Interaction: From Analysis to Models that Support Learning, 11 (1):
273--298(2000)