Decision Data Computer Corp, which specialises in adding value for mid-range IBM users in the old General Systems Division camp and in Europe operates as a joint venture with Olivetti & Co, needs to know just where all those System 36s, 38s and AS/400s are, and in France, it reckons that the total base rose to 20,260 machines last year, split 2,500 AS/400s, 1,810 System 38s, 13,950 System 36s split 5,750 for the 5360 model, 3,750 of the 5362s, 1,700 of the 5363s, 2,750 of the 5364s, and still 2,000 System 34s.