XLS

Article summary

XLS or xls may refer to: * .xls, the filename extension for Excel Binary File Format, a spreadsheet file format used by older versions of Microsoft Excel ** Blackboard Learn misuses this file extension when exporting what are actually tab-separated values files (which should have a .tsv or (less informatively) .txt extension), resulting in Microsoft Excel generating a warning message about the extension not matching the 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

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1. Summarise the article in your own words. Which single claim would you verify first, and why?
2. Which claim in this article is most likely to be revised as the sources update? How would you check its current status?
3. If two sources disagreed about one of these facts, what would you need in order to trust one over the other?

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