  I review the results obtained using the GHRS on low redshift Lyman alpha
absorbers. Until the advent of HST and the GHRS, the existence of such
absorbers was doubted. The confirmation of their existence, in one of the first
GHRS GTO team results to be published, must rank as one of the HSTs most
interesting results. The GHRS resolution allows us to probe equivalent widths
well below those detectable with the FOS, and has led to a number of
interesting new questions. One example is the apparent disagreement between the
GHRS result that there are many Lyman alpha absorbers which are not associated
with luminous galaxies, and FOS studies which suggest that all such absorbers
have a nearby galaxy causing them. This almost certainly shows that the
equivalent width (or column density) range reachable by the GHRS includes gas
from a wide range of causes, and not only the halos of luminous galaxies. With
these data, we are seeing the debris left over from Galaxy formation, material
flung out from galaxy interactions and starbursts, and also diffuse halo
material at the outer edges of normal galaxies.
