Notebook项目正式命名，超3000万用户

I still remember the exact room, watching @stevenbjohnson break down how he writes books. That was the spark for a little project we never imagined would grow this big.

Today, over 30 million people and 600,000 organizations use it, and it keeps growing. We all feel like it's just getting started.

For a while, we’ve just called it "Notebook" internally. Today, we're making it official externally. :)