The Barcode of Life Data System is a web platform specifically devoted to DNA barcoding. It is a cloud-based data storage and analysis platform developed at the Centre for Biodiversity Genomics in Canada. It consists of four main modules, a data portal, an educational portal, a registry of BINs, and a data collection and analysis workbench which provides an online platform for analyzing DNA sequences. Since its launch in 2005, BOLD has been extended to provide a range of functionality including data organization, validation, visualization and publication. The most recent version of the system, version 5, launched in 2024. Version 4, launched in 2017, brought a set of improvements supporting data collection and analysis but also included novel functionality improving data dissemination, citation, and annotation. Before November 16, 2020, BOLD already contained barcode sequences for 318,105 formally described species covering animals, plants, fungi, protists.