The Continuum Identification Code is the alphanumeric designation given to a continuum. There are three letters, a four-digit number, a three-digit number, and the initials of the name or pen name of the series' creator. If a continuum is divided into subcontinua, there is an extra letter to denote which one this is. If there is more than one author, the initials used are those of the author with top billing. Some agents find cryptic meanings in the first three letters and the numbers, but knowing the Flowers, it's probable that they're just random.