sci ATLAS is an approach for the automatic generation and optimization of numerical software. Currently ATLAS supplies optimized versions for the complete set of linear algebra kernels known as the Basic Linear Algebra Subroutines (BLAS), and a subset of the linear algebra routines in the LAPACK library. The libraries in this package contain full LAPACK FORTRAN 77 and C implementations, using routines from both ATLAS and the reference Netlib package.