Last year Andreas Weigend taught Stats 252 at Stanford and shared the following list of opposing characteristics of data communication:
| Structured | Unstructured |
| Symmetric | Asymmetric |
| Relevance | Chronological |
| Synchronous | Asynchronous |
| Searchable | Not Searchable |
| Private | Public |
| Broad | Narrow |
| One-time | Ongoing |
| Spontaneous | Planned |
| Short-term Identity | Persistent Identity |
| Push | Pull |
It’s always interesting to see the different startup companies focusing on different aspects of data.
There’s more to this list, so make a comment and add to this list.