Microsoft Excel 4.0 Workbook (xls)

Name: Microsoft Excel 4.0 Workbook (xls)

Version: 4W

Description: The Binary Interchange File Format (BIFF) is a spreadsheet file format developed by Microsoft. BIFF 4W is a native file format of Microsoft Excel 4.0 for Windows. Excel 4.0 allowed either a single worksheet to be stored as a worksheet file (BIFF 4S), or for multiple worksheets to be combined in a single workbook file (BIFF 4W). The format is proprietary and Microsoft does not make details of its structure public. The information contained here is derived primarily from's reverse-engineered documentation of the format, and should not therefore be regarded as definitive. BIFF is a stream based format, and a BIFF 4W file comprises a Workbook Globals Substream, containing a Beginning of File (BOF) record, one or more embedded Worksheet streams (in BIFF 4S format), and terminated by an End of File (EOF) record.

Deprecated: false

MIMEType: application/

PUID: fmt/58

sameAs : PRONOM:

Extension: xlw

Magic: true

Container Magic: false

Binary Magic: true

Signature Priority Over:

See Also (e.g. Wikidata, Library of Congress):

Software that can read the format:

Alias: Microsoft Excel Workbook (4.0)