That's basically two flavours of UNIX (Linux and BSD), but that's OK - others are unfortunately either dead or dying. The UNIX family tree (http://www.levenez.c

That's basically two flavours of UNIX (Linux and BSD), but that's OK - others are unfortunately either dead or dying. The UNIX family tree (http://www.levenez.com/unix http://www.levenez.com/unix) has been shrinking so rapidly in the last few years, that the current situation looks like the early years.