Machines for these purposes are now o ftwo types: keyboard machines for accounting and th elike, manually controlled for the insertion of data, a n dusually automatically controlled as far as the sequenceof operations is concerned; and punched-card machinesin which separate operations are usually delegated toa series of machines, and the cards then transferredbodily from one to another. B oth forms are very useful; bu t as far as complex computations are concerned,both are still in embryo.
It is interesting to see optimism in both forms of technology, and to know of how one of these definitely won in terms of longevity of use