This invention is a wearable circumferential array of electromyographic (EMG) sensors with a plurality of rings and columns of sensors which collect electromagnetic energy data concerning neuromuscular activity and functions as a Human-to-Computer Interface (HCI). In an example, it can be incorporated into a wearable device or clothing accessory such as an arm band, wrist band, finger ring, leg band, ankle band, bracelet, or watch strap. In an example, it can be incorporated into the cuff or sleeve of an article of clothing such as a shirt or a pair of shorts.