Every three days Nathan (not his real name), a 27-year-old venture capitalist in San Francisco, ingests 15 micrograms of lysergic acid diethylamide (commonly known as LSD or acid). From a story on 1843 Magazine: From the start, a small but significant crossover existed between those who were experimenting with drugs and the burgeoning tech community in San Francisco. "There were a group of engineers who believed there was a causal connection between creativity and LSD," recalls John Markoff, whose 2005 book, "What the Dormouse Said", traces the development of the personal-computer industry through 1960s counterculture. At one research centre in Menlo Park over 350 people -- particularly scientists, engineers and architects -- took part in experiments with psychedelics to see how the drugs affected their work. Tim Scully, a mathematician who, with the chemist Nick Sand, produced 3.6m tabs of LSD in the 1960s, worked at a computer company after being released from his ten-year prison sentence for supplying drugs. "Working in tech, it was more of a plus than a minus that I worked with LSD," he says. No one would turn up to work stoned or high but "people in technology, a lot of them, understood that psychedelics are an extremely good way of teaching you how to think outside the box." San Francisco appears to be at the epicentre of the new trend, just as it was during the original craze five decades ago. Tim Ferriss, an angel investor and author, claimed in 2015 in an interview with CNN that "the billionaires I know, almost without exception, use hallucinogens on a regular basis." Few billionaires are as open about their usage as Ferriss suggests. Steve Jobs was an exception: he spoke frequently about how "taking LSD was a profound experience, one of the most important things in my life." In Walter Isaacson's 2011 biography, the Apple CEO is quoted as joking that Microsoft would be a more original company if Bill Gates, its founder, had experienced psychedelics. As Silicon Valley is a place full of people whose most fervent desire is to be Steve Jobs, individuals are gradually opening up about their usage -- or talking about trying LSD for the first time.