Pre-sales questions

As the title says I am insterested in purchasing Social Stream - Social List, but I have a couple of questions I would like to have answered first:

- Does the stream to include Facebook, Twitter, Instagram and LinkedIn posts?
- Does this component allow me to create posts centrally from my website and post them on social networks I choose?

Thank you in advance.

Thank you for the reply and apologies for not being clear enough myself. Let me try to explain it a bit better:

I have a client that has Facebook, Twitter, Instagram and LinkedIn accounts and he wants to be able to post articles in the social media from somewhere centrally without the need to have to go and log in to each of his separate social accounts to post the same post.