<tool> A spreadsheet program from Microsoft, part of their Microsoft Office suite of productivity tools for {Microsoft Windows} and Macintosh. Excel is probably the most widely used spreadsheet in the world. Latest version: Excel 97, as of 1997-01-14. http://microsoft.com/msexcel/. [Feature summary? History?] (1997-01-14)

As with other spreadsheets, Microsoft Excel works only to limited accuracy because it retains only a certain number of figures to describe numbers (it has limited precision). With some exceptions regarding erroneous values, infinities, and denormalized numbers, Excel calculates in double-precision floating-point format from the IEEE 754 specification

<company> The biggest supplier of operating systems and other software for IBM PC compatibles. Software products include MS-DOS, Microsoft Windows, Windows NT, Microsoft Access, LAN Manager, MS Client, SQL Server, Open Data Base Connectivity (ODBC), MS Mail, and {SNA Server} for Windows NT. Microsoft was founded as "Micro-soft" in 1975 by Bill Gates (now CEO) and his high school pal Paul Allen. Their first product was a version of BASIC for the new Altair computer [which one?]. In 1980, IBM chose Microsoft to supply the operating system for the IBM PC. On the UK television program "The Net" in May 1994, {Bill Gates} said he was betting his company on the {information highway}". Quarterly sales $1293M, profits $362M (Aug 1994). http://microsoft.com/. ftp://ftp.microsoft.com/. {Interesting Info and Other Microsoft WWW Servers (http://www-drg.microsoft.com/devinfo.htm)}. {Microsoft Windows Developer Information (http://www-drg.microsoft.com/devinfo.htm)}. {Microsoft Research Group Information (http://research.microsoft.com)}. {Win_News (http://microsoft.com/chicago/ms-www/ms-intro.htm)}. maintained by the Personal Operating Systems Division to distribute information on Microsoft Windows, MS-DOS and Windows 95. (1998-11-06)