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} $\mathbb{N} \subset \mathbb{Z} \subset \mathbb{Q} \subset \mathbb{R} \subset \mathbb{C}$