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Bootstrap aggregating (bagging) is a machine learning ensemble meta-algorithm to improve machine learning of classification and regression models in terms of stability and classification accuracy. It also reduces variance and helps to avoid overfitting. — “Bootstrap aggregating - Wikipedia, the free encyclopedia”, en.wikipedia.org
 News aggregation websites. Examples of this sort of website are the Drudge Report and the Huffington Post. There are also websites like Google News, where aggregation is entirely automatic, using algorithms which carry out contextual analysis and group similar stories together.. — “News aggregator - Wikipedia, the free encyclopedia”, en.wikipedia.org
A fish aggregating (or aggregation) device (FAD) is a man-made object used to attract ocean going pelagic fish such as marlin, tuna and mahi-mahi (dolphin fish). They usually consist of buoys or floats tethered to the ocean floor with concrete blocks. — “Fish aggregating device - Wikipedia, the free encyclopedia”, en.wikipedia.org