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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.

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Running Emacs non-interactively via the `--batch` command-line option.
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editing in Emacs resides in an object called a buffer. Each time you visit a file, a buffer is used to hold the file's text. Each time you invoke Dired, a buffer is used to hold the d…
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Building Emacs from source
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is for the Emacs Lisp compiler in Emacs that compiles lisp code to byte-code for faster execution compared to uncompiled lisp code. Byte-compiled code is read by the byte-code interpreter.
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is for C source code editing, completions, formatting, compiling, folding, searching, executing, syntax checking, debugging, and other modern IDE features that Emacs supports.
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Questions related to the C++ language or the cc-mode
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Calculator mode: Calculator major mode.
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is for the desk calendar in Emacs, which also provides a diary for events that can be used for managing projects and appointments. `M-x calendar` displays an interactive calendar for picking dates in …