In the past few years, there has been a growing interest in the development of quantum-/atomic-based electric and magnetic sensors; as such, numerous companies and universities have recently started programs in the research and development of these quantum-based sensors. The Rydberg atom-based sensors now have the capability of measuring amplitude, polarization, and phase of RF fields and signals. As such, various applications are beginning to emerge. These include SI-traceable E-field probes, waveform analyzers, power sensors, voltage standards, RF cameras, receivers for communication signals (AM/FM modulated and digital phase modulation signals), TV/Video-Game streaming, and many other applications. This talk will summarize this technology.