A literature review is essential in a research project because Gill and Johnson (2009) indicate that it allows a researcher to have an idea of ​​the current state and limitations of the research subject. To support this fact, Wilson (2010) further explained that the work or research being done is not done in isolation, rather the researcher must rely on the thoughts of others who have conducted research of the same nature. He went further to say that the researcher is required to identify and highlight the documents that have been published and present the argument in a unified and logical manner. This chapter presents and discusses the definition and context of Business Intelligence (BI), key components of BI systems (BI architecture), benefits of BI applications, and analysis of barriers to adoption and implementation. the use of BI applications. Next comes a review of system adoption models, such as: Technology Acceptance Method (TAM); Technological organization and environment (TOE); Diffusion of Innovation (DOI); and Unified Technology Acceptance and Utilization Technology (UTAUT). Furthermore, a general overview of the retail sector is presented and the retail sector in Nigeria and its classification are discussed. Additionally, the relevant works are critically evaluated, and finally the chapter summary. Say no to plagiarism. Get a tailor-made essay on “Why violent video games should not be banned”?Get the original essayBusiness Intelligence (BI)The main idea behind BI is to help businesses and managers deal with problems of business analysis in order to make good business decisions, meet strategic objectives and, most importantly, better manage business process improvement. BI has its origins as far back as 1958, when Hans Peter Luhn, then a researcher at IBM, used the word BI in a published article. He described BI as the ability to understand all the data collected and analyzed to form a basis for a business to make the right decision. As the years passed and business operations improved and invention towards business analytics, the idea of ​​BI resurfaced and was made popular in 1989 by Howard Dresner who was then working as an analyst at Gartner Group . He described BI “as concepts and methods for making business decision-making easier and more accurate using a fact-based support system.” Its definition places greater emphasis on the value and importance of the analysis, reporting and query tools that embody BI, to provide users with the ability to manage and use information efficiently, accurately and efficient. As the support and need for BI continues to increase, many other authors and researchers have given different definitions to BI. The following is a brief description of how some authors define BI.Definition of Business IntelligenceGartner (2010), in his definition, characterizes BI as grouped applications, infrastructure, instruments and methods that facilitate the Data acquisition and information analysis that enables businesses to make an informed decision with precision and accuracy. Given this definition, BI has become central to today's business operations and processes. Similarly, Reinnschmidt and Francoise (2000) define BI as a combination of various tools and technologies applied to the collection, analysis and presentation of data processed as a necessary information for business decision making. Additionally, Wixom and Watson.