This document discusses brain-computer interface (BCI) technology, including what a BCI is, how it works by detecting and interpreting brain signals, its various types and applications, as well as limitations and future concerns such as further development and ethical issues.

2. What is Brain-Computer Interface?
Principle behind BCI
Objective of BCI
Types of BCIs
History
Implementation
Software behind BCI
Applications
Limitations
Future Concerns
Conclusion
References