Harwell-Boeing is a format for the storage of sparse numeric matrix data.

The commands Import, Export, ImportMatrix, and ExportMatrix can read and write to the HarwellBoeing format.

$M≔\mathrm{LinearAlgebra}:-\mathrm{RandomMatrix}\left(100\,\mathrm{datatype}=\mathrm{float}\left[8\right]\right)\:$

$\mathrm{Export}\left(''example.hb''\,M\,\mathrm{base}=\mathrm{homedir}\right)$

$303633$