Computer programs called bots have often been used to perform simple and repetitive tasks, such as correcting common misspellings and stylistic issues, or to start articles such as geography entries in a standard format from statistical data.[2][3][4] One controversial contributor creating articles with his bot was reported to create up to 10,000 articles on the Swedish Wikipedia on certain days.[5] Additionally, there are bots designed to automatically notify editors when they make common editing errors (such as unmatched quotes or unmatched parentheses).[6] Edits falsely identified by bots as the work of a banned editor can be restored by other editors.