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Unit 2: Generation of Computers

Figure 2.2: ENIAC
Notes

(ii) EDSAC (Electronic Delay Storage Automatic Calculator). It was made by Maurice Wilkes, at
Cambrige University. Its speed was 714 operations per second as shown in Figure 2.3.

Figure 2.3: EDSAC

(iii) EDVAC (Electronic Discrete Variable Automatic Computer). It was successor of EDSAC.
(iv) IAS machine (Princeton’s Institute of Advanced Studies). It was a new version of the EDVAC,
built by von Neumann. The basic design of IAS machine is now known as von Neumann machine,
which had five basic parts—the memory, the arithmetic logic unit, the program control unit, the
input and output unit as shown in Figure 2.4.

Figure 2.4: The Original Von Neumann Machine

Memory Unit Input Unit

Arithmetic Logic
Unit
Control Unit
Accumulator Output Unit

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