Reddit is one of the most popular sites on the web, with more than 200 million registered users generating over 8 billion page views a month.

There is a system (protocol) for indicating your desire to talk.

Over the past week I spent some time playing with Amino, which has the same underlying purpose as Reddit — user-generated communities based on specific interests — but takes a mobile-only approach that is aimed at a younger audience.

The startup, which raised its seed funding in 2014, has around 4 million active users across 92 communities.

This protocol is similar to others used in online classrooms.

Essentially, during subject oriented chat, the host has the floor at all times and no one is allowed to speak unless called on.