A Brain-Machine Interface (BMI) is a technology that connects the human brain to external devices, allowing for direct communication between the two. This interface can translate brain signals into commands that control machines, such as computers or prosthetic limbs, enabling individuals to perform tasks using their thoughts. BMIs are being researched for various applications, including helping people with disabilities regain mobility or control devices through thought alone. Companies and institutions, like Elon Musk's Neuralink and various universities, are exploring ways to improve these interfaces, aiming to enhance human capabilities and treat neurological disorders.