A Conflict-free Replicated Data Type (CRDT) is a data structure that
simplifies distributed data storage systems and multi-user applications.

In many systems, copies of some data need to be stored on multiple computers
(known as replicas). Examples of such systems include:

• Mobile apps that store data on the local device, and that need to sync that
  data to other devices belonging to the same user (such as calendars, notes,
  contacts, or reminders);
• Distributed databases, which maintain multiple replicas of the data (in the
  same datacenter or in different locations) so that the system continues
  working correctly if some of the replicas are offline;
• Collaboration software, such as Google Docs, Trello, Figma, or many others, in
  which several users can concurrently make changes to the same f