BLAS . The BLAS (Basic Linear Algebra Subprograms) are high quality "building block" routines for performing basic vector and matrix operations. ... If a vendor-optimized version of the BLAS is not available, one can obtain a Fortran77 reference implementation from the blas directory on the Home Site below. ... Some commercial numerical libraries such as NAG F77 library and some commercial compilers such as PGI compiling system comes with compiled BLAS and LAPACK. ... Numerical Analysis | ...