Convert MD to 4 (Man Page)

The MD file extension stands for "Markdown Documentation", a lightweight markup language used primarily for creating formatted text using a plain-text editor. Originally created by John Gruber in 2004, Markdown aims to be an easy-to-read and easy-to-write syntax for web content creation. Its primary use is in documentation files, readme files, and other technical documents where both simplicity and readability are paramount. The MD extension facilitates smooth conversion into HTML and other formats, making it an essential tool for developers and technical writers.

The 4 file extension refers to Unix Section 4 Manual Pages, which document special files and device drivers. These files, such as "mouse.4", describe how devices interact with the Unix operating system and are accessed using the "man" utility. Historically, these manual pages have been a fundamental part of Unix documentation, helping users understand and manage system devices.