We have found one software suitable in our database for this conversion.
WR1 files are old spreadsheets from Lotus Symphony software and they are typically not supported in modern spreadsheets programs.
However, if you have still access to old Lotus, you might want to try to export it as a CSV file, which can then be imported to Excel or other spreadsheet program.
Some viable alternative would be to use a dedicated converter, such as ABC Amber Lotus Converter.
WR1
Files with wr1 extension may be found as old spreadsheets made using the Lotus Symphony software (the old, not the new one).
XLS
Files with xls extension are best known as spreadsheets from Microsoft Excel. A spreadsheet is basically a grid of cells sorted in rows and columns. Each cell can contain text, numeric or formula data. Excel XLS spreadsheets can be opened in most other similar programs, such as OpenOffice.org Calc.