BIT CIRCLE is a term used to describe a type of computer security system. It is composed of three components: an ORB, LEI, and DOT. An ORB is an acronym for Open Relay Blocker, which is a type of software that prevents malicious emails from being sent out from a computer. LEI stands for Link Encryption Interface, which is a type of encryption technology used to protect data sent over the internet. Finally, DOT stands for Domain-based Object Trust, which is a type of authentication system that verifies the identity of users before allowing them access to a network. Together, these three components form a secure system that helps protect computers from cyber attacks.