\documentclass[a4paper]{report}
%\usepackage[draft]{pdfpages}
\usepackage[final]{pdfpages}
\usepackage{url}
\usepackage[utf8]{inputenc}
\usepackage{newunicodechar}
\newunicodechar{μ}{$\mu$}
\usepackage[hidelinks]{hyperref}
%\usepackage[colorlinks,urlcolor=blue,linkcolor=blue]{hyperref}
\addtolength{\footskip}{2cm}
\newcommand{\comment}[1]{}
\begin{document}
\includepdf[pages=-,pagecommand={\thispagestyle{empty}},noautoscale]{cover}
\includepdf[pages=-,pagecommand={\thispagestyle{empty}},noautoscale]{empty}
\section*{Preface}
\pdfbookmark[1]{Preface}{preface} EuroForth is an annual conference on
the Forth programming language, stack machines, and related topics,
and has been held since 1985.  The 37th EuroForth finds us mostly at
home, thanks to Covid19, and the conference is being held on the
Internet.  The two previous EuroForths were held as a remote
conference (2020) and in Hamburg, Germany (2019).  Information on
earlier conferences can be found at the EuroForth home page
(\url{http://www.euroforth.org/}).

Since 1994, EuroForth has a refereed and a non-refereed track.  This
year there have been two submissions to the refereed track, one of
which was accepted (50\% acceptance rate).  For more meaningful
statistics, I include the numbers since 2006: 30 submissions, 21
accepts, 70\% acceptance rate.  The papers were sent to three program
committee members for review, and they all produced reviews.  The
reviews of all papers are anonymous to the authors: The papers were
reviewed and the final decision taken without involving the authors.
This year one submission was co-authored by the program chair; Ulrich
Hoffmann served as secondary chair and organized the reviewing and the
final decision for that paper. I thank the program committee for their
service in reviewing the papers.  I thank the authors for their
papers.

\comment{Several papers \comment{and slide handouts} were submitted to the
non-refereed track in time to be included in the printed proceedings.}
Late papers will be included in the final proceedings
(\url{http://www.euroforth.org/ef20/papers/}).

\comment{These online proceedings
also contain \comment{papers and} presentations that were too late to
be included in the proceedings available during the
conference.\comment{Also, some of the papers included in the printed
  proceedings were updated for these online proceedings.}}

You can find these proceedings, as well as the individual papers and
slides, and links to the presentation videos on
\url{http://www.euroforth.org/ef21/papers/}.

Workshops and social events (yes, even in a remote conference)
complement the program.  This year's EuroForth is organized by Gerald
Wodni.
\vspace{2ex}

\hfill Anton Ertl

\subsection*{Program committee}

\setlength{\parindent}{0cm}
\hspace*{\parindent}%

M. Anton Ertl, TU Wien (chair)

Ulrich Hoffmann, FH Wedel University of Applied Sciences (secondary chair)

Matthias Koch, Institute of Quantum Optics, Leibniz University Hannover

Jaanus Pöial, Tallinn University of Technology

Bradford Rodriguez, T-Recursive Technology

Bill Stoddart

Reuben Thomas
\newpage
\currentpdfbookmark{\contentsname}{toc}
\tableofcontents


\newpage
\input{proceedings-files.tex}
\end{document}
