SALES of software for personal computers in Western Europe were worth dollars 444m for the second quarter of 1994. This represents a 15 per cent increase on the previous year. Windows- based programs grabbed the single biggest chunk of the market, with sales exceeding dollars 380m. Macintosh and Dos applications split the remainder of the market. For the first half of 1994 sales of Windows applications increased by 30 per cent, Dos fell by 28 per cent and sales of Macintosh applications fell by 1 per cent.