Answer:

BOT

Answer	Crossword Clue
BOT	Automated online script, as it were
BOT	CAPTCHA target
BOT	Many a modern commenter

BOT	Automaton, for short
BOT	24-7 computer program
BOT	Spam generator
BOT	Larva of a certain fly
BOT	Sci-fi sidekick, possibly
BOT	Spam sender, often
BOT	Horticulturalist's subj.
BOT	Automaton, briefly

BOT	Agric. course
BOT	Mendel's field: Abbr.
BOT	High-tech helper, briefly
BOT	Droid
BOT	Hi-tech battler
BOT	Hi-tech worker
BOT	Plant sci.
BOT	Mendel's sci.

BOT	Plant-life sci.
BOT	Droid cousin
BOT	'Droid
BOT	Repetitive computer program
BOT	Autonomous computer program
BOT	Search engine spider, e.g.
BOT	Many a Google program
BOT	Computer program that works automatically

BOT	Repetitive-task computer program
BOT	Spam producer
BOT	Automated task performer
BOT	Automated piece of software
BOT	High-tech battler
BOT	Sci-fi sidekick, often
BOT	AI game competitor
BOT	High-tech worker

BOT	Internet ..
BOT	Purchased, on the NYSE
BOT	Mechanical man, for short
BOT	Sci. course
BOT	Automated Web assistant