https://en.wikipedia.org/wiki/Big_data
https://en.wikipedia.org/wiki/Apache_Hadoop
https://en.wikipedia.org/wiki/SAS_(software)
QlikView

QlikView is the Business Intelligence platform for turning data into knowledge. It enables users to gain unexpected business insights by understanding how data is associated—and what data is not related. They can conduct direct and indirect searches across all data anywhere in the application—globally or within a single field. When the user clicks on a data point in a field, no queries are fired. Instead, all the other fields instantaneously filter themselves based on the selection the user made.
QlikView also offers guided exploration and discovery and collaborative analytics for sharing insights. Additionally, the program allows users to build and deploy analytic apps without requiring professional development skills, helping drive faster response to changing business requirements, shorter time to value, and more insight across an organization.

Tableau

Tableau Desktop is an analytic tool for anyone. It is designed to support how people think. Easily combine data by drag & drop to spot trends, identify opportunities, and make data-guided decisions with confidence. Creating interactive presentations allows the audience to explore the data in a self-explaining way. Tableau also allows working offline by extracting data for ad-hoc analysis of massive data in seconds. It combines advances in database and computer graphics technology so it is possible to analyze huge datasets on a laptop also.

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