There are so many similarities between the brain and computer, which enable us to make such inventions as b⇌cis. by making inventions like brain-to-computer and computer-to-brain interfaces, we can use the unique properties of computers for human welfare. in this presentation, we will discuss brain-to-computer & computer-to brain interfaces more precisely. the brain-computer interface is a direct communication pathway between the brain and the computer. neural activity is transferred to computer command with the help of bcis (brain to computer interfaces). we can increase human capabilities with the help of b⇌cis. we can provide vision to the blind, make the deaf audible, amplify cognition, make work done without physical efforts and much more using b⇌cis