A common LOGIN system that provided unique login ID and password, such that using this unique ID and password can get you login to every website. It exist such system but seems not very success.
A website/forum that store Idea and user have quick response on it. Like wikipedia, but it’s base on IDEA not real stuff.
A standard for man to live, lol. E.g. Teaching lecturer how to make lecture notes, how to do lockpicking, explain why you can kill fish but not dog.
A website teaching how to login to any system with various versions if you forget password, it’s the most needed. E.g. router’s default psw; windows xp create user; linux single mode login…
Distributed computing through browser. 1 server to store your personal data and processing is made by other online computers.