boast 1. v. boastÂ·ed, boastÂ·ing, boasts. v. intr. To talk or write about oneself or something related to oneself in a proud or self-admiring way. v. tr.
A supercomputer is a computer that performs at or near the currently highest operational rate for computers. A supercomputer is typically used for scientific and engineering applications that must handle very large databases or do a great amount of computation (or both).
The Batcomputer as presented in The Dark Knight is a super-computer with advanced capabilities featuring an 8 Monitor setup with several Dell PowerEdge Server class Desktops adjacent to his main desk. From the screenshots, it's shown to be using a form of Linux from the Joker screen captures.