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2. Best Free PDF Editors of 2023 - AOL

   www.aol.com/best-free-pdf-editors-2023-204004606...

   While PDFs provide greater security than Word documents, Google Docs or spreadsheets, it is possible to edit a PDF. You just need the right software or app. Best Free PDF Editors of 2023

3. ggplot2 - Wikipedia

   en.wikipedia.org/wiki/Ggplot2

   ggplot2 is an open-source data visualization package for the statistical programming language R.Created by Hadley Wickham in 2005, ggplot2 is an implementation of Leland Wilkinson's Grammar of Graphics—a general scheme for data visualization which breaks up graphs into semantic components such as scales and layers. ggplot2 can serve as a replacement for the base graphics in R and contains a ...

4. List of PDF software - Wikipedia

   en.wikipedia.org/wiki/List_of_PDF_software

   A commercial PDF editor, markup and collaboration product aimed at engineering and architectural markets. Foxit Reader: Freeware: Highlight text, draw lines, measure distances of PDF documents. Foxit PDF Editor Suite: Free trial: Integrated PDF Editing and eSign anywhere. Optionally, ChatGPT+ gDoc Fusion: Proprietary/Shareware

5. PDFedit - Wikipedia

   en.wikipedia.org/wiki/PDFedit

   PDFedit is a free PDF editor for Unix-like operating systems (including Cygwin on top of Windows). It does not support editing protected or encrypted PDF files or word processor-style text manipulation, however. [1] PDFedit GUI is based on the Qt 3 toolkit and scripting engine , so every operation is scriptable.

6. Smallpdf.com - Wikipedia

   en.wikipedia.org/wiki/Smallpdf.com

   Smallpdf is a Swiss online web-based PDF software, founded in 2013. [2] It offers free version with limited features to compress, convert and edit PDF documents. [ 3 ] And its paid version offers advanced features like OCR, compress, and more [ 4 ] .

7. Art gallery problem - Wikipedia

   en.wikipedia.org/wiki/Art_gallery_problem

   The art gallery problem can be applied in several domains such as in robotics, when artificial intelligences (AI) need to execute movements depending on their surroundings. Other domains, where this problem is applied, are in image editing , lighting problems of a stage or installation of infrastructures for the warning of natural disasters.