MD Markdown Format
Markdown is a lightweight plain-text markup, written so that the source stays readable as text while still describing headings, lists, links, and emphasis. It was designed as a shorthand that converts cleanly into HTML.
Because a Markdown file is just text, it works with every tool built for text: version control diffs it line by line, editors handle it without plugins, and scripts can generate or transform it without a document library.
That is why it took over technical writing. Documentation, READMEs, and notes live in Markdown because the source is durable and diffable, and the presentation layer is a rendering decision made later.[1][2][3][4]