Paper by Shahid Shayaa et al at IEEE: “The development of IoT technologies and the massive admiration and acceptance of social media tools and applications, new doors of opportunity have been opened for using data analytics in gaining meaningful insights from unstructured information. The application of opinion mining and sentiment analysis (OMSA) in the era of big data have been used a useful way in categorize the opinion into different sentiment and in general evaluating the mood of the public. Moreover, different techniques of OMSA have been developed over the years in different datasets and applied to various experimental settings. In this regard, this study presents a comprehensive systematic literature review, aims to discuss both technical aspect of OMSA (techniques, types) and non-technical aspect in the form of application areas are discussed. Furthermore, the study also highlighted both technical aspect of OMSA in the form of challenges in the development of its technique and non-technical challenges mainly based on its application. These challenges are presented as a future direction for research….(More)”.