Gmail

"If you wanted to pick a single date to mark the beginning of the modern era of the web, you could do a lot worse than choosing Thursday, April 1, 2004, the day Gmail launched."

"You are going to be doing a lot of writing. Do it well. Phone calls and Hangouts don’t scale. Face-to-face is expensive for distributed groups and therefore rare. Real-time tools like IRC and Slack disadvantage people in minority timezones. And so, in an online community, your main way to communicate is likely going to be email. Which means you need to be good at it. Take the time to write carefully, fully and precisely. And since text is going to do so much of your communicative heavy lifting, consider being a little more explicit about emotional signal-sending than you might be otherwise. (“I am happy…”, “it is sad…”, “I am grateful.”)"