How has the method of voting changed from the first General Election of 1952 to the General Election of 2004?

1. In the first General Election a box was placed inside each polling booth for each candidate with the election symbol of the candidate. Each voter was given a blank ballot paper to drop into the box, they wanted to vote for. 

2. After first two elections, this method was changed. Now ballot paper carried the names and symbols of candidates and the voter stamped against the name of candidate to vote for. 

3. In 2004, Electronic Voting Machine were introduced to press the button according to choice of the voter containing the name of candidate and symbol of political party.

In the first General Election, a box was placed inside each polling booth for each candidate with the election symbol of the Candidate. Each voter was given a blank ballot paper to drop into the box, they wanted to vote for. After the first two elections, this method was changed. Now ballot paper carried the names and symbols of the candidates and the voter had to stamp on the name of the candidate they wanted to vote for. Whereas in 2004, Electronic Voting Machine was introduced, where the voter had to press the button according to the choice of the voter containing the name of candidate and symbol of political party.