Please cite this article as: Salahuddin, M., Gow, J., The effects of Internet usage, financial development and trade openness on economic growth in South Africa: A time series analysis, Telematics and Informatics (2015), doi: http://dx.doi.org/10.1016/j.tele. 2015.11.006 This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting proof before it is published in its final form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain. and variance decomposition analysis. Based on these findings, this study recommends that the South African government continue with policies that aim to invest more resources into its Internet infrastructure to further expand its network and usage.