FIRST GENERATION OF
COMPUTERS (1940 to 1956)
Based on vacuum tubes, first generation
computers were very large in size. This
generation computers used machine
language (i.e. 1's and 0's).Magnetic drums
were used as primary internal storage
medium and punched cards for input. In this
generation mainly batch processing
operating system was used. Computers of
this generation were primarily used for
scientific and research purposes. Electronic
Numerical Integrator and Calculator
(ENIAC), Universal Automatic Computer
(UNIVAC) are examples of fi rst generation
computers. 5 Fig: 1.8 Tabulating Machine F
