What is overt and covert discrimination?

When something is overt, it is made obvious. Overt discrimination would be openly discriminating against a person or group of people something like saying, "If you are of a certain ethnic background, you can't vote in this election." Another example would be a time in our history when restaurants openly refused to serve people who were African-American."

In contrast, covert discrimination would not involve acts of forbidding certain people to vote, but rather involve something like using voting machines that malfunction a lot in neighborhoods where certain people are more likely to live and vote. This makes it so that a particular group's vote is less likely to be counted.