Chapter 1. Internet, asynchrony, multiuser…wow!
An application that combines Internet, asynchrony, and multiple users cooperating and interacting at the same time always deserves a “wow!”. At some point, we have all doubtlessly been amazed by the interactivity that some modern web systems can offer, such as Facebook, Twitter, Gmail, Google Docs, Office Web Apps, or many others, where we receive updates almost in real time without having to reload the page.
For example, when we are editing a document online using Office Web Apps and another user also accesses it, we can see that they have entered the document and follow the changes that they are making. Even in a more everyday scenario such as a simple web chat, the messages being typed by our friend ...
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