Flip-flops can be divided into common types: the RS (\"set-reset\"), D (\"data\" or \"delay\"[15]), T (\"toggle\"), and JK types are the common ones. The behavior of a particular type can be described by what is termed the characteristic equation, which derives the \"next\" (i.e., after the next clock pulse) output, Qnext, in terms of the input signal(s) and/or the current output, Q. Characteristic: Q+ = R\'Q + R\'S or Q+ = R\'Q + S