1. Amazon Elastic MapReduce, http://aws.amazon.com/elasticmapreduce/.
2. Apache, http://httpd.apache.org/.
3. Hadoop, http://hadoop.apache.org/.
4. Hadoop Distributed File System, http://hadoop.apache.org/docs/stable/hdfs_design.html.
5. Hadoop MapReduce, http://hadoop.apache.org/docs/stable/mapred_tutorial.html.