Microsoft Excel is a commercial spreadsheet application written and distributed by Microsoft for Microsoft Windows and Mac OS X. Pre-2007 versions of Excel use XLS as the primary format for saving files. It features calculation, graphing tools, pivot tables, and a macro programming language called Visual Basic for Applications. It has been a very widely applied spreadsheet for these platforms, especially since version 5 in 1993, and it has almost completely replaced Lotus 1-2-3 as the industry standard for spreadsheets. Excel forms part of Microsoft Office. The current versions are 2010 for Microsoft Windows and 2011 for Mac OS X.
Microsoft Excel up until 2007 version used a proprietary binary file format called Binary Interchange File Format (BIFF) as its primary format. Used as the basis for XLS files it is a persistence format that supports authoring and manipulating content in workbooks and workbook templates. Most versions of Microsoft Excel can read CSV, DBF, SYLK, DIF, and other legacy formats.
HTML5 is the fifth revision of the HTML standard, it's main aims are to improve the support for the all types of multimedia with the intention to keep it readable by both humans, computers and all devices. HTML5 has become the adopted standard following Apple CEO Steve Jobs very open letter entitled 'Thoughts on Flash' where he concludes that 'Flash is no longer necessary to watch video or consume any kind of web content' and that 'new open standards created in the mobile era, such as HTML5, will win'.
Any Web Browser (e.g. Internet Explorer, Safari, Firefox, Google Chrome)