MFD may refer to: Fire departments Madison Fire Department, US Minneapolis Fire Department, US Milwaukee Fire Department, US Mumbai Fire Brigade, India Science, technology, and medicine Macroscopic Fundamental Diagram, a type of fundamental diagram of traffic flow in transportation engineering Medium-density fibreboard Microfarad, a unit of electrical capacitance sometimes written as "MFD" Minimum focus distance, in macro photography Mode field diameter, an expression of distribution of the irradiance, across the end face of a single-mode fiber Modular function deployment, a method for product modularization Multifunction display, an interactive system for presenting various information Mutation Frequency Decline, a gene/gene product used in transcription-coupled repair Computing Multifunction device, an office all-in-one device (copier, printer, scanner) Micro Floppy Disk, the 3½-inch floppy disk format; See History of the floppy disk Mini Floppy Disk, the 5¼-inch floppy disk format; See History of the floppy disk Hiring m/f/d, an initialism welcoming "male, female and disabled (or diverse)" candidates. Transportation Mansfield Lahm Regional Airport (IATA airport code) Minoan Flying Dolphins, a Greek ferry company See also Mladá fronta DNES (MF DNES), a daily newspaper in the Czech Republic