  We present the results of computation of cohomology for some Lie
(super)algebras of Hamiltonian vector fields and related algebras. At present,
the full cohomology rings for these algebras are not known even for the low
dimensional vector fields. The partial ``experimental'' results may give some
hints for solution of the whole problem. The computations have been carried out
with the help of recently written program in C language. Some of the presented
results are new.
