CoCoA (Computations in Commutative Algebra)is a free computer algebra system developed by the University of Genova, Italy, used to compute with numbers and polynomials. The CoCoA Library (CoCoALib) is available under GNU General Public License. CoCoA has been ported to many operating systems including Macintosh on PPC and x86, Linux on x86, x86-64 & PPC, Solaris on SPARC and Windows on x86.CoCoA is mainly used by researchers (see citations atand), but can be useful even for "simple" computations. CoCoA's features include: CoCoALib is based on GNU Multi-Precision Library.