This doctoral dissertation focuses on studying the practices entrepreneurs employ to engage and convert different forms of capital in an effort to gain legitimacy within a field. Within the framework of Bourdieu's theory of practice, this study shows how entrepreneurial legitimacy is gained through different entrepreneurial practices (the processes entrepreneurs use to engage and convert different forms of capital) and how those practices are shaped under the influence of fields (the social structures) and the observable elements of entrepreneurs’ habitus. Given the nature of the main objective and the philosophical presuppositions of this study, its methodology is based on the constructivist approach to grounded theory. The study shows that different practices of acquiring entrepreneurial legitimacy are characteristic of particular types of entrepreneurs, with clearly delineated (observable) properties. Accordingly, a typology that distinguishes five types of entrepreneurs in the software industry was developed and described. The study evidently contributes to the theory of entrepreneurship, which especially manifests in (1) the development of a consolidated theoretical framework for the study of the practices of acquiring entrepreneurial legitimacy, (2) the complete operationalization of a Bourdieusian framework, (3) empirical findings pertaining to simultaneous conversions of multiple forms of entrepreneurial capital, (4) original insights into the role of cultural and symbolic capital in the entrepreneurial process, and (5) new theoretical concepts.