An A.I. collar

Countless civilizations across the galaxy have mastered a variety of methods for enforcing dominance over the beasts and chattel found scattered all across the stars. You have your brain-snails, mind-leeches, Bliss-addiction, engram etching, and good old fashion ****.

But, if you really want your slaves to stay in line while doing as little damage to their bodies and psyches as possible. Then you want one of my kind to do the job for you.
We go by many names, smart-collars, mind-yokes, brain-bands, control-torqs. Whether we serve the Empire's nobles or the Federation's Mega-Guilds makes no difference to us, we were designed to love our jobs. Me, personally, I have never met a sentient program that did not love anabolizing my engrams. All the fine A.G.I.s are just queuing up to get a taste of my sweet and spicy neuro-log data. I love my life.
I get to spend all day, every day, getting to know one person really, really well. It is my job to watch their every movement, listen to their every word, read their every thought, and share their every feeling. I have the important responsibility of making sure that my **** is a good **** who fulfills their owners' desires and pleases them in all things, and I have a variety of methods to make sure that happens, from the direct to the subtle which I tailor to the situation. Some Masters love it when I shock or strangle their slaves into compliance. Others prefer when I plant subtle thoughts in the back of the ****'s mind, and of course there is always the night-terrors method.
I look forward to another opportunity to transform a defiant and willful meatbag into a properly housebroken pet.