Are you having problems with your golf swing and can't figure out what the problem is? Fujitsu has a mobile-phone application now in development that can help. ETGA Golf Lesson, which was jointly developed by Fujitsu and another Japanese company, Sensing Control Lab, draws on data from an accelerometer and a compass in the mobile phone to measure and analyze a user's golf swing. The application then tells you whether your swing was good, or whether it needs improvement, assigning a score from 1 to 100 to each swing. It also keeps a running tally of your previous scores, giving you an overall score. The application will appear in mobile phones near the end of this year.