In various guises, this is a common question, seemingly innocent, but actually betraying a fundamental confusion about LaTeX directory, and the levels of operation in the TeX World; concepts, distributions, variants and the TeX family and friends (i.e., users, contributors, dependent and extensions in terms of language and softwares). TeX is a typesetting language developed by Donald E. Kunth, today's worldwide de facto standard for high quality document typesetting. LateX is a Tex based typesetting system and collection of macros for document compilation and publication - not a word processor. MiKTeX is a compiler and an Windows O/S based TeX/LaTeX distributions. The purpose of this read is to clear the confusion and give a comprehensive introduction to the World of LaTeX, hence provide information and technical bases for anyone, authors including academias to choose between LaTeX/Tex distributions to install given the features of the offered LaTeX engines and Compilers needed by their project or document typesetting. This fills the gaps in knowledge and literature, aside numerous plagiarized blogs , confusing articles (as learning latex itself) , confusing articles (as learning latex itself) and guidelines relating to scientific typesetting, LaTeX distributions, .tex editors, LaTeX distributions, .tex editors, Latex2e, LaTeX3 and the the LaTeX family.In various guises, this is a common question, seemingly innocent, but actually betraying a fundamental confusion about LaTeX directory, and the levels of operation in the TeX/LaTeX ; concepts, distributions, editors, various implementations, and the TeX family and friends. TeX is a typesetting language developed by Donald E. Kunth, and today’s worldwide de facto standard for high quality document typesetting for writers/authors in the academics and publishers of journals and books, including Elsevier, PlosOne, JSON and Nature Springer. LateX and ConTeXt are the two main evolution direction of TeX. LaTeX is a TeX macro and markup language extension original created by Leslie Lamport. It is a free document typesetting and processing system for creating high quality rich document format, and outputs in device transferable formats (DVI, PDF, HTML, etc) suitable for submission to journals, institutions and publishers for ultimate publication. It is in principle and editing style different from a Word Processor, and was meant to encourage and enable authors concentrate more on writing rich contents, leaving document design to expert document designers. MiKTeX is a modern TeX distribution for Microsoft Windows, Linux and macOS, while TexStudio (likewise TeXnicenter) are GUI TeX document editors. The purpose of this article is to clear the confusion and give a comprehensive introduction to anyone, (authors including academics) to choose between TeX/LaTeX distributions and editors to install given offered particular feature advantages, an the particular of the users' academic field and level of productivity on their project, report or document. The author relied on primary source documents, chats with LaTeX development members on stackexchange.com, literatures, and extensive software features testing and hoped this publication fills the gaps in knowledge and literature, aside numerous plagiarized blogs , confusing articles (as learning LaTeX itself). Also discussed are the future of LaTeX project, the dropped parallel LaTeX3 , the new policy of ”gentle re-factory of Latex2e”, tagged PDF and both the limits and challenges ahead of LaTeX project. The most important breakthroughs/evolution in TeX extension and development projects are the creation of pdfTeX in 2014, graphic editors, GUI and online TeX editors, expl3 language as part of LaTeX kernel in 2020, also syncing/integrating tools to other platforms/environment.