Neat 😊 LaTeX is really solid. There’s a solution for every problem…
\\documentclass{article}
\\usepackage{acronym}
\\begin{document}
\\begin{acronym}
\\acro{CAN}{Campus Area Network}
\\acro{CAN2}\[CAN\]{Controller Area Network}
\\end{acronym}
\\ac{CAN} \\\\
\\ac{CAN2}
\\end{document}