Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. EpiData refers to a group of applications used in combination for creating documented data structures and analysis of quantitative data. The EpiData Association, which created the software, was created in 1999 and is based in Denmark. EpiData was developed in Pascal and uses open standards such as HTML where possible. EpiData is widely used by organizations and individuals to create and analyze large amounts of data. The World Health Organization (WHO) uses EpiData in its STEPS method of collecting epidemiological, medical, and public health data, for biostatistics, and for other quantitative-based projects.