Is there a web service like a blackboard?

Question

Computer networks

Is there a web service like a blackboard? You need a shared space for notes that can be left by several (3-5) users. The notes are brief and divided into some areas, but everything is immediately in front of your eyes - let's say the upper left corner is about Pelevin's stories, and the upper right is about storks.
Notes of the form title and thought
Title: Stork and triplets
Thought: Children are told that storks bring children, but if there are 3 or more children, do you need several storks? Absurd.

Answer 1

it's not entirely clear what you need, but try realtimeboard.com