Single non-transferable vote

The single non-transferable vote (often Abbreviated to S.N.T.V.) is an electoral system for multiple member electoral districts. It is an electoral system which can produce an proportional result but it will depend on the district's magnitude (the number of representatives in the electoral district) if there is more members in each electoral district the more proportional the result will be. In many cases the single non-transferable vote has been replaced by other voting systems. 
In certain cases S.N.T.V. is thought to be similar to Plurality-at-large voting, commonly refereed as Bloc Voting, but is different because in S.N.T.V electors are only allowed to vote for one candidate but in Plurality-at-large voting the voter have as many votes as there are seats to win. 
Example.
This example has three winners in the electoral district
Current Usage.
Today there are very few places which use the Single Non Transferable Vote: