Rather than declare a plague on both houses and stick to its current Berkeley implementation of Unix, Sony Corp has decided to hedge its bets and exploit its erasable optical disk technology to offer users the option of running either AT&T’s Unix System V.4 or the Open Software Foundation’s variant of IBM’s AIX on their News workstations. It ap pears there is going to be no resol ution to this, so it is important for the hardware manufacturer to support both, Sony said. Under the plan, the operating system will be separated from the hardware and supplied on magneto-optical disks, and Sony hopes thereby to raise its market share in Japan, claimed to be 20%, but with a tiny base: it looks to have sold 6,000 News workstations in the year to March 31, double the number it sold in Japan in 1987-88.