Transistors replaced vacuum tubes and were used in the second generation of computers.
In second generation computers, assembly language was used which allowed programmers to specify instructions in words.
High Level programming languages were also being developed
at this time such as COBOL and FORTRAN.
The above images show the second generation computers.
Second generation computers used mnemonics code that consists of very short words for commands. Assembly language programs needed to be converted into machine language by an assembler before it could be run.
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