10-1.3 Patterns A FIM is essentially a nine-bit code consisting of bars and no-bar placeholders. The presence of a bar can be considered a binary “1” (one), and the absence of a bar can be considered a binary “0” (zero). The required FIM pattern depends on the type of mail and the presence of a delivery point barcode or an Intelligent Mail barcode, as follows: FIM A is for CRM with a preprinted barcode and metered reply mail with a preprinted barcode. (The binary code for FIM A is 110010011.) FIM B is for BRM without a preprinted BRM ZIP+4 barcode. (The binary code for FIM B is 101101101.) FIM C is for BRM with a preprinted BRM ZIP+4 barcode and for PRM with a preprinted delivery point barcode. (The binary code for FIM C is 110101011.) FIM D is for letter-size First-Class Mail pieces with PC Postage or IBI printed with nonfluorescent ink directly on the envelope. (The binary code for FIM D is 111010111.) FIM E is for postcard-size and letter-size First-Class Mail with customized services. (The binary code for FIM E is 101000101.) See Exhibit 10-1 for FIM patterns. Exhibit 10-1  FIM Patterns (not drawn to scale)   Pattern Use Barcoded? Courtesy Reply Mail Metered Reply Mail Yes Business Reply Mail without a preprinted barcode No Business Reply Mail with a preprinted barcode Yes IBI Meters PC Postage Systems Not required (the meters contain the same information contained is a barcode) Customized Services Yes — but IMb only