Quattro Pro

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Quattro Pro is a spreadsheet program, from Borland, currently sold by Corel, most often as part of WordPerfect Office.

Historically, it used keyboard commands strongly reminiscent to Lotus 1-2-3. It currently runs under the Windows operating system. It is known to have less-capable calculations than Microsoft's Excel. For example, in many versions, subtracting dates fails to produce the number of days between two dates. However, for simple graphs most feel that it produces superior results. Quattro Pro also avoids Excel's long-standing worksheet size limitation of 65,536 rows by 256 columns, with a maximum worksheet size of one million rows by 18,276 columns.