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Dear and @academicchatter folks:
(mastodon.social)
From Wikipedia, the free encyclopedia
Linux is a family of open source Unix-like operating systems based on the Linux kernel, an operating system kernel first released on September 17, 1991 by Linus Torvalds. Linux is typically packaged in a Linux distribution (or distro for short).
Distributions include the Linux kernel and supporting system software and libraries, many of which are provided by the GNU Project. Many Linux distributions use the word "Linux" in their name, but the Free Software Foundation uses the name GNU/Linux to emphasize the importance of GNU software, causing some controversy.
Community icon by Alpár-Etele Méder, licensed under CC BY 3.0
The first tool I can think of is LibreOffice Draw
Maybe there are other tools, but I think LibreOffice Draw do the job pretty well
Edit: If the PDF has written text, you may wanna use an OCR tool, but I don't have any to suggest