There are two main types of REGs. One uses a white noise source and the other uses the computer to generate pseudo random events. NES, MARS, Scio, Oberon and Metascan all use pseudo random event generators, whereas Quantec and CoRe use white noise diodes in a USB-attached chip to generate the pseudo random events. No studies have shown that a white noise-generated random event is any more likely to be connect the physical “real” world with the virtual world than one that is generated on a computer. But the actual way that the pseudo random event is generated is not as important as how it is processed and the software code or algorithms that do that processing.