Google Squared is a search tool that helps you quickly build a collection of facts from the Web for any topic you specify.

• Facts about your topic are organized as a table of items and attributes (we call them “Squares” for fun)
• Customize these Squares to see just the items and attributes you’re interested in
  
• See the websites that served as sources for the information in your Square
  
• Save and share Squares with others

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The power of Google Squared is in quickly looking up differential diagnosis. Just type the name of the name of the symptom and you get a list of differentials with other relevant data. However most “squares” with the description of individual diagnosis pulls information and links from wikipedia. The descriptions would have been more useful if they were from an authoritative source.

Here is a quick list of differentials that I have created using Google Squared:

Chest Pain

Cough

Headache

Shortness of Breath

More information on Google Squared: Google Help, Google Blog