A multi-programmable non-volatile device is operated with a floating gate that functions as a FET gate that overlaps a portion of a source/drain region and allows for variable coupling through geometry and/or biasing conditions. This allows a programming voltage for the device to be imparted to the floating gate through variable capacitive coupling, thus changing the state of the device. Different source/drain regions can be used for program and read operations. The invention can be used in environments such as data encryption, reference trimming, manufacturing ID, security ID, and many other applications.