  White dwarfs carry information on the structure and evolution of the Galaxy,
especially through their luminosity function and initial-to-final mass
relation. Very cool white dwarfs provide insight into the early ages of each
population. Examining the spectra of all stars with $3\sigma$ proper motion in
the Sloan Digital Sky Survey Data Release 14, we report the classification for
20 088 spectroscopically confirmed white dwarfs, plus 415 hot subdwarfs, and
311 cataclysmic variables. We obtain Teff, log g and mass for hydrogen
atmosphere white dwarf stars (DAs), warm helium atmosphere white dwarfs (DBs),
hot subdwarfs (sdBs and sdOs), and estimate photometric Teff for white dwarf
stars with continuum spectra (DCs). We find 15793 sdAs and 447 dCs between the
white dwarf cooling sequence and the main sequence, especially below Teff=
10000 K; most are likely low-mass metal-poor main sequence stars, but some
could be the result of interacting binary evolution.
