Abstract: A method for computing system learning of a merchant category code includes accessing a social media platform using administrative information of a merchant to obtain social media information of the merchant, and performing natural language processing on the social media information to add key terms to a merchant terminology corpus defined for the merchant. The key terms in the first merchant terminology corpus are normalized. For each key term in the first merchant terminology corpus and for each merchant category code, a frequency value for the merchant category code is calculated to obtain multiple frequency values. The method further includes aggregating frequency values across the first key terms in the first merchant terminology corpus to select the matching merchant category code of the merchant, and applying the matching merchant category code to the merchant.