Support of the Lotus 1-2-3 formats has shown a steady decline over recent years. This also applies to its SmartSuite and Organizer products. IBM officially ceased its support for Lotus 123 on 30 September 2014 (see the announcement here). 3 Support by modern spreadsheet software.Lotus Symphony (the '80s version, not the unrelated 2000s version which used a variant of Open Office format) used a similar file format.

wk2, and from then on the number in the extension corresponded to the program version number. wk1 extension, but that was soon changed to. When 1-2-3 was finally officially discontinued in 2013 (by IBM, which now owns Lotus), the general reaction was 'What, they still made 1-2-3 until now? I thought it died a long time ago.' Making 1-2-3 part of a new 'Lotus SmartSuite' didn't help bring it back to prominence.

Both were spreadsheets which used a similar interface, still familiar to modern spreadsheet users, consisting of a matrix of rows and columns where the columns have letters and the rows have numbers, and a cell can be addressed by an address such as 'B2'.Īfter years of dominance of the spreadsheet market for PC/MS-DOS, 1-2-3 failed to successfully move over to the Windows platform, and was eclipsed by Microsoft Excel. Lotus 1-2-3 was regarded as the 'killer app' of the IBM PC in its early days, just as VisiCalc was for the Apple II platform.

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