Stolen from here.
LaTeX like this:
\begin{table}[H]
\caption{Number Sets}
\label{tab:email}
\begin{tabular}{cl}
\midrule
$\mathbb{N}$ & Natural Integers \\
$\mathbb{Z}$ & Relative Integers \\
$\mathbb{D}$ & Decimal Numbers \\
$\mathbb{Q}$ & Rational Numbers \\
$\mathbb{R}$ & Real Numbers \\
$\mathbb{I}$ & Pure Imaginary Numbers \\
$\mathbb{C}$ & Complex Numbers \\
\midrule
\end{tabular}
\end{table}
$\mathbb{N} \subset \mathbb{Z} \subset \mathbb{Q} \subset \mathbb{R} \subset \mathbb{C}$
