+.\" Copyright (c) 1980 Regents of the University of California.
+.\" All rights reserved. The Berkeley software License Agreement
+.\" specifies the terms and conditions for redistribution.
+.\"
+.\" @(#)ex.1 4.1 (Berkeley) %G%
+.\"
+.TH EX 1 8/26/80
+.UC 4
+.SH NAME
+ex, edit \- text editor
+.SH SYNOPSIS
+.B ex
+[
+.B \-
+] [
+.B \-v
+] [
+.B \-t
+tag
+] [
+.B \-r
+] [
+\fB\+\fIcommand\fR
+] [
+.B \-l
+]
+name ...
+.br
+.B edit
+[
+ex options
+]
+.SH DESCRIPTION
+.I Ex
+is the root of a family of editors:
+.I edit,
+.I ex
+and
+.I vi.
+.I Ex
+is a superset of
+.I ed,
+with the most notable extension being a display editing facility.
+Display based editing is the focus of
+.I vi.
+.PP
+If you have not used
+.I ed,
+or are a casual user, you will find that the editor
+.I edit
+is convenient for you.
+It avoids some of the complexities of
+.I ex
+used mostly by systems programmers and persons very familiar with
+.I ed.
+.PP
+If you have a \s-2CRT\s0 terminal, you may wish to use a display
+based editor; in this case
+see
+.IR vi (1),
+which is a command which focuses on the display editing portion of
+.I ex.
+.SH DOCUMENTATION
+The document
+.I "Edit: A tutorial"
+provides a comprehensive introduction to
+.I edit
+assuming no previous knowledge of computers or the \s-2UNIX\s0 system.
+.PP
+The
+.I "Ex Reference Manual \- Version 3.5"
+is a comprehensive and complete manual for the command mode features
+of
+.I ex,
+but you cannot learn to use the editor by reading it.
+For an introduction to
+more advanced forms of editing using the command mode of
+.I ex
+see the editing documents written by Brian Kernighan for the editor
+.I ed;
+the material in the introductory and advanced documents works also with
+.I ex.
+.PP
+.I "An Introduction to Display Editing with Vi"
+introduces the display editor
+.I vi
+and provides reference material on
+.I vi.
+All of these documents can be found in volume 2c of the Programmer's Manual.
+In addition, the
+.I "Vi Quick Reference"
+card summarizes the commands
+of
+.I vi
+in a useful, functional way, and is useful with the
+.I Introduction.
+.SH FILES
+.DT
+/usr/lib/ex?.?strings error messages
+.br
+/usr/lib/ex?.?recover recover command
+.br
+/usr/lib/ex?.?preserve preserve command
+.br
+/etc/termcap describes capabilities of terminals
+.br
+~/.exrc editor startup file
+.br
+/tmp/Ex\fInnnnn\fR editor temporary
+.br
+/tmp/Rx\fInnnnn\fR named buffer temporary
+.br
+/usr/preserve preservation directory
+.SH SEE ALSO
+awk(1), ed(1), grep(1), sed(1), grep(1), vi(1), termcap(5), environ(5)
+.SH AUTHOR
+Originally written by William Joy
+.br
+Mark Horton has maintained the editor since version 2.7, adding macros,
+support for many unusual terminals,
+and other features such as word abbreviation mode.
+.SH BUGS
+The
+.I undo
+command causes all marks to be lost on lines changed and then restored
+if the marked lines were changed.
+.PP
+.I Undo
+never clears the buffer modified condition.
+.PP
+The
+.I z
+command prints a number of logical rather than physical lines.
+More than a screen full of output may result if long lines are present.
+.PP
+File input/output errors don't print a name if the command line \fB`\-'\fR
+option is used.
+.PP
+There is no easy way to do a single scan ignoring case.
+.PP
+The editor does not warn if text is placed in named buffers and not used
+before exiting the editor.
+.PP
+Null characters are discarded in input files, and cannot appear in resultant
+files.
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