The Leet language was formed in the Bulletin Board System in 1990, where the status of "elite" provided users with access to files and folders stored here, to games and to special chats. At first, it was considered the language of hackers, but later migrated to the mainstream, thanks to such network comics as Megatokyo. Forms of the Leet language, used not for entertainment, contain a more complex set of characters than the mainstream version, and are still used for the same purpose — to encrypt and hide from prying eyes the meaning of the conversation. Therefore, "professional" Leet can use a combination of cryptological techniques that make written thoroughly incomprehensible to the uninitiated. Only a select few will be able to understand their letter.