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A tag is a keyword or label that categorizes your question with other, similar questions. Using the right tags makes it easier for others to find and answer your question.

Major mode for editing Autoconf files.
an alternative to the standard Ruby interpreter, IRB.
an authoring and publishing environment for Emacs. It simplifies the process of writings documents and publishing them to various output formats.
a TeX build automation tool
Major mode for editing pip (Python package installer) requirements files
Helm version of swiper. Swiper package for GNU Emacs that gives you an overview as you search for a regex.
a special tag that is designed to be used only by the system for questions that have had all of their other tags removed. Do not add this tag to existing questions, it is reserved for use by t…
Questions about the C code underlying an Emacs implementation.
FFI stands for _Foreign Function Interface_.