Several document formats in the past used sdw extension for their files, including Lotus WordPro and certain versions of OpenOffice,org. Some word processing software still support these file types and can re-save them to a doc format used in Microsoft Word.
Found 2 different conversion types using the same filename extensions.
Conversion sdw to doc type 1:
Convert from Lotus WordPro drawing file to Microsoft Word document (prior version 2007).
Microsoft Windows software - convert sdw to doc on Windows
AbiWord is a free cross-platform word processor that is part of GNOME office suite. AbiWord is unique among word processors in its drive to become a fully cross-platform word processor.
File type (from-> to)
Convert from sdw file
Lotus WordPro drawing file
to doc file
Microsoft Word document (prior version 2007)
The tables with software actions are a good pointer for what a certain program does with various file types and often may give users a good hint how to perform certain file conversion, for example the above-mentioned sdw to doc. However, it is not perfect and sometimes can show results which are not really usable because of how certain programs work with files and the possible conversion is thus actually not possible at all.
Conversion sdw to doc type 2:
Convert from OpenOffice.org text document to Microsoft Word document (prior version 2007).
Apple macOS / Mac OS X software - convert sdw to doc on OS X
NeoOffice is an office productivity software for Mac OS X created as an alternative to OpenOffice.org. It has everything needed for common office including word processor, spreadsheet, presentation program, and graphics program.
Multiplatform software - convert sdw to doc on any platform
LibreOffice Write is a complete word processor and document publishing tool that supports a plethora of document formats and has many innovative features. It's an open source software that comes as an integral part of LibreOffice suite.
Apache OpenOffice Writer (OpenOffice.org Writer) is a fully-featured and free word processor and text editor from OpenOffice.org productivity suite.
Apache OpenOffice Writer is simple enough for a quick memo, yet powerful enough to create complete books with contents, diagrams, indexes, etc. You're free to concentrate on your ideas while Writer makes them look great.