  The Rossi X-ray Timing Explorer (RXTE) was successfully launched on 1995
December 30 and has been operational since that time. Its three instruments are
probing regions close to compact objects, degenerate dwarfs, neutron stars,
stellar black holes and the central engines of AGN. Temporal studies with the
ASM and PCA have already yielded rich results which pertain to the environs,
evolution, and nature of the compact objects in galactic systems. Here I review
some selected results from these instruments, as obtained by various RXTE
observers. The ASM is providing detailed light curves of about 60 detected
sources and has uncovered new temporal/spectral states of galactic binary
systems. The bizarre behavior of the possibly very young binary system, Cir
X-1, is being revealed in detail by both the ASM and the PCA. A rare high/soft
state of the black-hole candidate, Cyg X-1 provides new insight into the nature
of the low/high transitions in black-hole binaries. The PCA has made possible
the discovery of oscillations near 1 kHz in ten low-mass X-ray binary systems.
These are most probably direct indicators of the neutron-star spin in some
cases and probably indirect indicators in others. Studies of microquasars have
unveiled a host of new temporal phenomena which may provide links between
accretion processes and the radio jets in these systems.
