SONATA stands for "systems of nearrings and their applications". It provides methods for the construction and the analysis of finite nearrings.
Citation:
@manual{SONATA,
author = "Aichinger, E. and Binder, F. and Ecker, J. and Mayr, P. and
N{\"o}bauer, C.",
title = "{SONATA} - system of near-rings and their applications, {GAP}
package, Version 2",
year = 2003,
note = "\verb+(http://www.algebra.uni-linz.ac.at/Sonata/)+"}