A collection of information used to analyze, calculate, or research a specific topic.

Software used to analyze, calculate, or research a specific topic.

An organized collection of images, graphics, and text used to explain a topic.

An article that has been printed and made available to the public.

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1 year, 7 months, 10 days and 17 hours ago

1 year, 7 months, 10 days and 17 hours ago

1 year, 7 months, 10 days and 17 hours ago