I am a software development engineer in test for Infosys. My job is officially to write automated tests in Selenium Webdriver. I'm also a web developer as a hobbyest
Binary isn't the only system. A bi-quinary system was also proposed that would have, due to the wavelength nature of electricity, given us the ability to have a decimal system in our computers. Five levels of voltage above ground, five levels of voltage below. However, such a system was complex, power-hungry, and unreliable due to quantum mechanics (if the wavelengths were too small, it got difficult to precisely measure which level its at, and if the wavelengths are too big, it was too energy inefficient.)
youtube.com/watch?v=thrx3SBEpL8