In the following a short sketch on the old inp file is provided:
# Description of an example "inp" file
Note that we use atomic units, i.e. the length is in Bohr-radii (1 a.u. = 0.5291772108(18) Å) and the energy is in Hartree: 1 htr = 2 Ry = 27.2113845(23) eV. For bulk or film calculations, the energy zero is the average interstitial potential or the vacuum energy, respectively.