  The most complete list of visual binary systems with known orbital elements
is compiled. It is based on OARMAC and ORB6 data and contains 3139 orbits for
2278 pairs. A refined subset of high quality orbits with available distance was
also compiled. Relations between and distributions along different
observational parameters are constructed, and an analysis of selection effects
is made. Dynamical, photometric and spectral masses of systems are estimated,
and reasons for discrepancies between them are discussed.
