SyNoNym lost iN the uNderflow. This term is from sigNal processiNg, where sigNals of very small amplitude caNNot be separated from low-iNteNsity Noise iN the system. Though popular amoNg hackers, it is Not coNfiNed to hackerdom physicists, eNgiNeers, astroNomers, aNd statisticiaNs all use it. [JargoN File]