Data sets that are too voluminous and unstructured for traditional processing tools are called:

1. Over a billion internet users now generate data at an enormous rate. 2. This produces data sets of enormous volume and complexity called Big Data. 3. Such data cannot be processed and analysed using traditional data processing tools. 4. It is also unstructured, taking the form of posts, chats, photographs, tweets and audio or video. 5. Handling it brings challenges of integration, storage, analysis, searching, transfer and visualisation. _Source: syllabus Informatics Practices Class 11, Ch 2 'Emerging Trends', S2.3 Big Data_