Digital history is the use of digital media and computational analytics for furthering historical practice, presentation, analysis, or research. It is a branch of the Digital humanities and an outgrowth of quantitative history, cliometrics, and history and computing. Work in digital history tends to be either digital public history, which is concerned primarily with engaging online audiences with historical content, or digital research methods, which uses computers to conduct analyses that further academic research and tend to be written for specialist experts and presented via traditional academic peer review channels. Early work in digital history during the 1990s and early 2000s included digital archives, CD-ROMs, online presentations, interactive maps, time-lines, audio files, and virtual worlds. More recent digital history projects focus on creativity, collaboration, and technical innovation, text mining, corpus linguistics, 3D Modeling, and big data analysis.