XLS

XLS or xls may refer to: X and or /..&..\ x
 * Microsoft Excel file format, a spreadsheet file format
 * Cadillac XLS, a prototype Cadillac concept car
 * Exelis Inc. (NYSE symbol), a global aerospace, defense, information and services company
 * Lusitanian language (ISO 639-3 code), an Indo-European Paleohispanic language
 * Midwest Questar XLS, an American ultralight aircraft design
 * Saint-Louis Airport (IATA airport code), near Saint-Louis, Senegal