1. AWS EC2. http://aws.amazon.com/ec2/. AWS EC2. http://aws.amazon.com/ec2/.
2. Spot Bid Advisor. https://aws.amazon.com/ec2/spot/bid-advisor/. Spot Bid Advisor. https://aws.amazon.com/ec2/spot/bid-advisor/.
3. Google Compute Engine. https://cloud.google.com/compute/. Google Compute Engine. https://cloud.google.com/compute/.
4. Apache Hadoop. http://hadoop.apache.org/. Apache Hadoop. http://hadoop.apache.org/.
5. New York Times dataset. http://www.ldc.upenn.edu/. New York Times dataset. http://www.ldc.upenn.edu/.