External Neck Interface
The External Neck Interface is traditionally worn around the neck. Some of these devices are as elegant as a necklace, while others are as overbearing and obvious as a life vest. One thing is for sure, most, if not all vassals wear a "hugger" as they are colloquially called. They are also called "collar" and an "engagement ring" sarcastically. Usually, large corps like to keep proprietary software separate from a users body and this would be housed in the hugger. Most famous to wear one: Heracles.