A unit of data transfer speed equal to one change in a carrier signal per second. Since most data transmission schemes transfer more than one bit of data with each change in the carrier signal, one baud is usually equal to several bits per second.
A unit of signaling speed in telegraphic code.
The signaling rate of a line, which is the number of transitions (voltage or frequency changes) that are created per second. The term has often been erroneously used to specify bits per second (bps). However, only at very low speeds is baud equal to bps; for example, 300 baud is the same as 300 bps. Beyond that, one baud can be made to represent more than one bit. For example, a V.22bis modem generates 1,200 bps at 600 baud. See baudot code, baud barf and modem.