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> axpy? mm? dia? nrm2?

Those are the standard BLAS names for those things.

BLAS and LAPACK have an excuse, they come old school Fortran (FORTRAN 77) that originally had a max on function name size.

But people have a reason to know those abbreviations, just like Unix programmers have a reason to know names like "stat" and "fctnl" and "ioctl".