\documentclass[a4paper]{article}

% math
\usepackage{amsmath}

% figures
\usepackage{float}
\usepackage{graphicx}

% tables
\usepackage{array}

% language
\usepackage[italian]{babel}

\title{Hardware e Software}
\author{Naoki Pross}

\begin{document}
\maketitle

\include{tex/memorie}
\include{tex/circuiti_digitali}
\include{tex/convertitori}
\include{tex/trasmissione_seriale}

\tableofcontents
\section*{Bibliografia}

\end{document}