An improved system and method for data card emulation is provided that enables a single data card to emulate any one of multiple data cards. The data card includes an improved system and method for conveying data involving pulsed light that can read a barcode and can emulate a barcode. The improved system and method for conveying data may also include at least one of a magnetic stripe reader or a magnetic stripe emulator. The data card uses the improved system and method for conveying data to interface with conventional barcode and/or magnetic stripe readers, to interface with other such data cards or other devices having similar circuitry, and to interface with a data management system used to manage barcode and/or magnetic stripe information stored in a memory on the data card.