1401 Compatibility Feature on the IBM System/360 Model 30 The "second generation" of stored-program computers, of which IBM 1400 series was a part, brought EDP into the mass market for the first time on a large scale. As this era unfolded, rapid changes in technology led to rapid obsolescence of data processing equipment. Program written for a particular system required tedious conversion as incompatible new machines came into use. The IBM System/360 has been designed with the conversion problem specifically in mind. One of the conversion aids available on the Model 30 is the 1401 compatibility feature. This feature, in conjunction with other aids, permits a smooth and inexpensive transition to optimum use of the new system. CACM December, 1965 McCormack, M. A. Schansman, T. T. Womack, K. K. CA651208 JB March 6, 1978 3:55 PM 1161 5 1161 1161 5 1161 1161 5 1161