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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is for the abbreviation feature of Emacs where a string of characters are expanded to a longer string. Mainly used to reduce typing, `abbrev` are recorded in a table that is shared locally, among buf…
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a package to switch between windows.
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is for the Elisp advice feature that changes an existing definition of a function in a way that lets you undo the change easily. This tag applies to both old and new advice features. The old advice fe…
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is the code searching tool similar to `ack` but uses `pthreads` for faster searches.
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for questions about aligning text vertically. For example, formatting tables so the columns in a row line up under the columns in the previous row; or having consecutive rows of text…
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is for the Emacs ansi terminal emulator. Emacs supports ANSI-standard VT100-style escape sequences recognized by such modern terminals as xterm. `M-x ansi-term` command starts a terminal, which by def…
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An extensively-customized spin of Emacs for use on Apple's OSX.
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a TeX build automation tool
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or alist for short, maps keys to values. It is a list of key-value pairs, where each pair is a cons whose car is the key and whose cdr is the value.
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is for AUCTeX package that extends basic `tex-mode` Emacs provides for editing TeX files. AUCTeX integrates many built-in and external macro packages for creating, editing, printing, publishing, and m…
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Auto-Complete, also known as auto-complete.el or Auto-Complete Mode, is an Emacs extension that provides context-sensitive completion suggestions
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Major mode for editing Autoconf configure.ac files.