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\def\META{{\Z METAFONT}} 
\def\La{L\kern-.1667em\raise.5ex\hbox{a}\kern-.1em}
\def\fl#1{\null\par \leftline{\bf #1?}}
\def\teX{\null\kern1.5pt\TeX}
\def\The{\null\kern1.5pt The}
\parskip 10pt plus 1pt
\parindent=0pt
\def\AmSTeX{$\cal A\kern-.1667em\lower.5ex\hbox{$\cal M$}\kern-.125em S$-\TeX}
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\ooalign {\hfil\kern.03em \raise .09ex\hbox {R}\hfil \crcr 
\lower .25ex\hbox{\mathhexbox 20D}}}}}
%\footline={\ifnum \folio=1 {\trademark\ \TeX\ is a registered trademark of The 
%American Mathematical Society.\hfill} \else {\hfill\folio\hfill}\fi}

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\noindent
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\hbox to 10.95\varunit{\hfill \bfl Introducing \TeX\kern .1em\trademark \hfill}
\hbox to 15.50\varunit{\null\hfill\null}
\teX\ is a computerized typesetting system that is regularly used for
technical papers,
business forms, letters, theses, concert programs,
catalogues, and books of all sorts and in particular those that are
technical and highly mathematical. \teX\ was created by Professor Donald
E. Knuth and his associates and students at Stanford University.  The
current version, with many new features, has been completely rewritten by
Professor Knuth, after several years of operating experience with the
earlier versions on many different~computer~systems.
\hbox to 30.4\varunit{\null\hfill\null}
\The\ \TeX\ system has been standardized
to produce identical results on different computer systems and it will run
on any reasonably large system.  The \TeX\ output files are also device
independent. The output may be printed on
a graphics printer of modest capabilities for proofing and, when the results
are satisfactory, the same output may
be used with a higher quality printer or phototypesetting system to
produce the final document.}
\vbox{\hfill\box0\hfill}

%\footnote{}{\null\kern-9pt \trademark \TeX\ is a trademark of the American
\footnote{}{\lower.2ex\hbox{\trademark} \TeX\ is a trademark of the American
Mathematical Society.}
\hyphenpenalty=50
\bigskip
\fl{How does \TeX\ differ from other document compilers}
\TeX\ provides for automatic ligature replacements, kerning, hyphenation,
line justification, centering, flushing right or left, tabular aligning,
the formatting of complicated mathematical expressions, automatic section and page
numbering, page breaking, the introduction of running heads, the numbering
and placing of footnotes, and the automatic preparation of a table of contents and an
index, to name but a few of its special features.
As many as 256 different fonts with up to 256 characters per font may be
used for a single document.
\TeX's real forte is mathematics:
$$
\sum_{i=1}↑{\infty}{1\over2↑i}=1,\quad
\{\underbrace{\overbrace{\mathstrut a,\ldots,a}
      ↑{k\;a\mathchar`'\rm s},
    \overbrace{\mathstrut b,\ldots,b}
      ↑{l\;b\mathchar`'\rm s}}_{k+l\rm\;elements}\},\quad
\sqrt{1+\sqrt{1+\sqrt{1+x}}},\quad
A=\pmatrix{
a_{11}&\ldots&a_{1n}\cr
\vdots&\ddots&\vdots\cr
a_{m1}&\ldots&a_{mn}\cr},
$$
$$
\biggl(\int_{-\infty}↑\infty e↑{-x↑2}\,dx\biggr)↑2=\pi,\quad
 2\uparrow\uparrow k\mathrel{\mathop=↑{\rm def}}
  2↑{2↑{2↑{\cdot↑{\cdot↑{\cdot↑2}}}}}
    \vbox{\hbox{$\Big\}\scriptstyle k$}\kern0pt},\quad
{f(x+\Delta x)-f(x)\over\Delta x}\to f'(x)\;\;\hbox{as $\;\Delta x\to0$}.
$$
\TeX\ differs from other document compilers in that it performs 
all of the above functions, while meeting the highest typographic standards, and
at the same time it provides
an extremely great amount of flexibility to allow formatting of a
wide range of document types and styles, subject only to the detailed
requirements of the user.

\bye