When you enter text in a cell in OpenOffice Calc, you might find that your text is incorrectly capitalized and you cannot correct it! For example, while writing a vocabulary list, I entered 'sun' and it was capitalized as 'Sun' (maybe referring to a certain technology company). If you type Ctrl+Z to undo this capitalization, all the text in the cell is removed, not just the capitalization. It seems that Calc's AutoInput feature is automatically capitalizing text before it is entered (unlike 'AutoCorrect', which makes the correction after the text is entered, so you can undo the capitalization). I don't know how AutoInput differs from AutoCorrect, and I haven't found AutoInput useful so I've disabled it using menu item Tools / Cell Contents / AutoInput.