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second generation computer : FOLDOC | second generation computer A computer built from transistors, designed between the mid-1950s and mid-1960s. Ferrite core memory and {magnetic drums} replaced cathode ray tube and {delay-line storage} for main memory. {Index registers} and floating-point arithmetic hardware became widespread. Machine-independent {high level programming languages} such as ALGOL, COBOL and Fortran were introduced to simplify programming. {I/O processors} were introduced to supervise input-output operations independently of the CPU thus freeing the CPU from time-consuming housekeeping functions. The CPU would send the I/O processor an initial instruction to start operating and the I/O processor would then continue independently of the CPU. When completed, or in the event of an error, the I/O processor sent an interrupt to the CPU. Batch processing became feasible with the improvement in I/O and storage technology in that a batch of jobs could be
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