A typographical error or typo is a word that has been spelt wrong by accident. There are a few ways to make a typo:

1. Hitting the wrong key while typing. Example: "Tom amd Jane are friends."
2. Pressing the keys in the wrong order. Example: "Tom nad Jane are friends."
3. Forgetting to press a key. Example "Tom nd Jane are friends."
4. Holding a key too long, causing a letting to be typed twice. Example "Tom andd Jane are friends."

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