LaTeX-MWE-multicoltabular

\documentclass[11pt,a4paper]{article}

\usepackage{fontspec}
\usepackage[margin=1cm,landscape]{geometry}
\usepackage{multicol}
\usepackage{supertabular}

\makeatletter
\let\mcnewpage=\newpage
\newcommand{\TrickSupertabularIntoMulticols}{%
  \renewcommand\newpage{%
    \if@firstcolumn
      \hrule width\linewidth height0pt
      \columnbreak
    \else
      \mcnewpage
    \fi
  }%
}
\makeatother

\begin{document}
\thispagestyle{empty}

\begin{multicols*}{3}
  \TrickSupertabularIntoMulticols
  \begin{supertabular}{ll}
C-c          & Prefix Command                                 \tabularnewline
C-x          & Prefix Command                                 \tabularnewline
ESC          & Prefix Command                                 \tabularnewline
<C-down>     & ein:worksheet-goto-next-input-km               \tabularnewline
<C-up>       & ein:worksheet-goto-prev-input-km               \tabularnewline
<M-S-return> & ein:worksheet-execute-cell-and-insert-below-km \tabularnewline
<M-down>     & ein:worksheet-not-move-cell-down-km            \tabularnewline
<M-up>       & ein:worksheet-not-move-cell-up-km              \tabularnewline
             &                                                \tabularnewline
C-x C-s      & ein:notebook-save-notebook-command-km          \tabularnewline
C-x C-w      & ein:notebook-rename-command-km                 \tabularnewline
             &                                                \tabularnewline
M-RET        & ein:worksheet-execute-cell-and-goto-next-km    \tabularnewline
M-,          & ein:pytools-jump-back-command                  \tabularnewline
M-.          & ein:pytools-jump-to-source-command             \tabularnewline
             &                                                \tabularnewline
C-c C-a      & ein:worksheet-insert-cell-above-km             \tabularnewline
C-c C-b      & ein:worksheet-insert-cell-below-km             \tabularnewline
C-c C-c      & ein:worksheet-execute-cell-km                  \tabularnewline
C-u C-c C-c  & ein:worksheet-execute-all-cells                \tabularnewline
C-c C-e      & ein:worksheet-toggle-output-km                 \tabularnewline
C-c C-f      & ein:file-open-km                               \tabularnewline
C-c C-h      & ein:pytools-request-help-km                    \tabularnewline
C-c C-k      & ein:worksheet-kill-cell-km                     \tabularnewline
C-c C-l      & ein:worksheet-clear-output-km                  \tabularnewline
C-c RET      & ein:worksheet-merge-cell-km                    \tabularnewline
C-c C-n      & ein:worksheet-goto-next-input-km               \tabularnewline
C-c C-o      & ein:notebook-open-km                           \tabularnewline
C-c C-p      & ein:worksheet-goto-prev-input-km               \tabularnewline
C-c C-q      & ein:notebook-kill-kernel-then-close-command-km \tabularnewline
C-c C-r      & ein:notebook-reconnect-session-command-km      \tabularnewline
C-c C-s      & ein:worksheet-split-cell-at-point-km           \tabularnewline
C-c C-t      & ein:worksheet-toggle-cell-type-km              \tabularnewline
C-c C-u      & ein:worksheet-change-cell-type-km              \tabularnewline
C-c C-v      & ein:worksheet-set-output-visibility-all-km     \tabularnewline
C-c C-w      & ein:worksheet-copy-cell-km                     \tabularnewline
C-c C-x      & Prefix Command                                 \tabularnewline
C-c C-y      & ein:worksheet-yank-cell-km                     \tabularnewline
C-c C-z      & ein:notebook-kernel-interrupt-command-km       \tabularnewline
C-c ESC      & Prefix Command                                 \tabularnewline
C-c !        & ein:worksheet-rename-sheet-km                  \tabularnewline
C-c +        & ein:notebook-worksheet-insert-next-km          \tabularnewline
C-c -        & ein:notebook-worksheet-delete-km               \tabularnewline
C-c 1        & ein:notebook-worksheet-open-1th-km             \tabularnewline
C-c 2        & ein:notebook-worksheet-open-2th-km             \tabularnewline
C-c 3        & ein:notebook-worksheet-open-3th-km             \tabularnewline
C-c 4        & ein:notebook-worksheet-open-4th-km             \tabularnewline
C-c 5        & ein:notebook-worksheet-open-5th-km             \tabularnewline
C-c 6        & ein:notebook-worksheet-open-6th-km             \tabularnewline
C-c 7        & ein:notebook-worksheet-open-7th-km             \tabularnewline
C-c 8        & ein:notebook-worksheet-open-8th-km             \tabularnewline
C-c 9        & ein:notebook-worksheet-open-last-km            \tabularnewline
C-c \{       & ein:notebook-worksheet-open-prev-or-last-km    \tabularnewline
C-c \}       & ein:notebook-worksheet-open-next-or-first-km   \tabularnewline
C-c C-S-l    & ein:worksheet-clear-all-output-km              \tabularnewline
C-c C-\#     & ein:notebook-close-km                          \tabularnewline
C-c C-\$     & ein:tb-show-km                                 \tabularnewline
C-c C-/      & ein:notebook-scratchsheet-open-km              \tabularnewline
C-c C-;      & ein:shared-output-show-code-cell-at-point-km   \tabularnewline
C-c <down>   & ein:worksheet-move-cell-down-km                \tabularnewline
C-c <up>     & ein:worksheet-move-cell-up-km                  \tabularnewline
             &                                                \tabularnewline
C-c C-x C-r  & ein:notebook-restart-session-command-km        \tabularnewline
             &                                                \tabularnewline
C-c M-+      & ein:notebook-worksheet-insert-prev-km          \tabularnewline
C-c M-w      & ein:worksheet-copy-cell-km                     \tabularnewline
C-c M-\{     & ein:notebook-worksheet-move-prev-km            \tabularnewline
C-c M-\}     & ein:notebook-worksheet-move-next-km            \tabularnewline
\end{supertabular}
\end{multicols*}

\end{document}

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