We’ve found the fallout from creating on platforms you don’t own. Having locked out of social media channels you’ve expended years developing. Acquiring hacked and losing every thing. So how did they are doing it? Christian Wolmar describes how the London Underground was designed at a time when no-one experienced https://manueljvhrc.answerblogs.com/28240842/indicators-on-worlds-first-system-you-should-know