- Extension
- .wk1
- .xlsm
- Format
- Binary
- Binary
- Category
- Spreadsheet
- Spreadsheet
- Developer
- IBM
- Microsoft
- Description
- Lotus Worksheet (wk1) is a file type used by the Lotus 1-2-3 spreadsheet application. It is a binary file format used to store worksheets, which can contain numerical and textual data, as well as formulas, charts, and images. It is now considered an obsolete file type and is replaced by the newer xlsx format.
- It is a macro-enabled spreadsheet file developed using Microsoft Excel and it holds worksheets arranged in rows and columns. The macros are created using Visual Basic for Applications (VBA) language.
- MIME Type
- application/vnd.lotus-1-2-3
- application/vnd.ms-excel.sheet.macroEnabled.12
