Although in standard terminology the running instance of Emacs would
be called a window, in Emacs terminology it is called a
frame. Within Emacs itself, there is a window in which we see the
welcome “GNU Emacs” buffer (more on windows and buffers in a bit).
The blinking black cursor (over the W in “Welcome”) is called the
point. Not only is it like a cursor in your standard text editor
(where the text is inserted when you type), but it is the location
where you will sometimes need to run functions as well (e.g., “change
the word that the point is currently in to be uppercase”). We’ll come
back to this later.
The grey bar at the bottom of the screen is the status bar and
displays various information about the point and the active buffer
(there is one status bar per window). The white space below that is
called the mini-buffer and will occasionally display status messages
(e.g., after saving a file), and is also the place where you enter
Emacs commands.
Referred link:
http://www.jesshamrick.com/2012/09/10/absolute-beginners-guide-to-emacs/
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