This paper attempts to examine the e-libraries, digital libraries, electronic libraries, and online libraries employing bibliometric study techniques from 1971 to 2020. It focuses to consolidate the published documents on the library indexed in Web of Science. It has been observed that we found 4266 published documents employing bibliometric analysis. The study findings show that digital libraries are the top topic, proceeding paper is the top type of document, and most are published in the English language. Similarly, the year 2006 to 2010 has the highest number of published documents, top author Fox EA, Dept. Comp Sci top organisation, United States top country, and digital libraries as a top keyword has been found. Further, the name of Liu et al. has been at the top of the author’s list. Moreover, the results are presented in tables and figures to show the trend of data.