A literature review is essential in a research project as Gill and Johnson (2009) indicate that it allows a researcher to get an idea of ​​the current state and limitations of the research topic . To support this fact, Wilson (2010), further explained that the work or research done is not done in isolation, but rather the researcher should leverage the thoughts of other people who have done research of the same nature. He went further to state that the researcher is required to identify and highlight materials that have been published and present the topic in a unified and logical manner. This chapter presents and discusses the definition and background of Business Intelligence (BI), the key components of BI systems (the BI architecture), the benefits of BI applications, and the analysis of barriers to application adoption and use BI. This is followed by a review of systems 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, the general overview of the retail sector is presented and the retail sector in Nigeria and its classification are discussed. Furthermore, related works and finally the chapter summary are critically evaluated. Say no to plagiarism. Get a tailor-made essay on "Why Violent Video Games Shouldn't Be Banned"? Get an original essayBusiness Intelligence (BI)The main idea behind BI is to help companies and managers handle business analysis problems in other to make good business decisions, meeting strategic objectives and most importantly, better manage improvement of business processes. BI has its origins way back in 1958, when then-IBM researcher Hans Peter Luhn used the word BI in a published paper. He described BI as the ability to understand all the data collected and analyzed to form a basis for a company to make the right decision. As the years passed and business operations improved and invention continued towards business analytics, the idea of ​​BI resurfaced and was popularized in 1989 thanks to Howard Dresner who was then working as an analyst at Gartner Group. He described BI “as concepts and methods for making business decision making simpler and more accurate using a fact-based support system.” His definition places greater emphasis on the value and importance of analysis, reporting and query tools that incorporate BI, to provide users with the ability to manage and use information efficiently, accurately and effectively. As the support and need for BI continues to increase, many other authors and scholars have given different definitions of BI. The following is a brief description of how some authors define BI. Definition of Business Intelligence Gartner (2010), in its definition characterized BI as applications, infrastructures, tools and methods grouped together that facilitate the acquisition of data and analysis of information that allows companies 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 Francouise (2000), define BI as a combination of various tools and technologies applied in data collection and analysis and in presenting the processed data as information to achieve business decision making. Furthermore, Wixom and Watson (2001), define BI as "a broad category of technologies, applications and processes for.