This talk is about the CDF observation of top.  The topics covered
will be the dilepton analysis, a few words about the detector, doing b-physics
with the silicon vertex detector, the SVX b-tag analysis, the cross section
and the mass analysis.

     We have been doing collider physics for a long time.  Collisions were
detected in 1985 (figure 3).  Our first Physics run with an integrated
luminosity of 25 nb^-1 took place in 1987-88.  Our next run with a luminosity
of 4 pb^-1 resulted in a limit on the top mass of greater than 91 GeV/c^2.
This limit was primarily determined from the number of dilepton events.  In
Run 1a (luminosity = 19.3 pb^-1) we presented evidence for the existence of
the top quark.  This evidence depends on the observation of dilepton events,
and lepton plus 3 or more jets, where one of the jets is tagged as a b jet.
The b jet is tagged using either SVX tracking information to find a displaced
vertex or a soft lepton tag (SLT) indicating a b decay (b -> l nu X, or
B -> c -> l nu X).  Earlier this year we reported the observation of the top
quark.  This observation is also based on the dilepton and b-tag (SVX and SLT)
modes but with better statistics.  This talk refers to the same sample as
reported in ref. 1 with a combined luminosity from run 1a and 1b of 67^-1
(note that as of June 12 the combined luminosity was over 100 pb^-1).