WK4 file extension is for Lotus 1-2-3 version 3.4 Spreadsheet
Similar to WK4
8SVX - Amiga 8-bit Sound format8U - Roman 8 extended character set printer font PageMaker
91 - 91x91 dpi display font Ventura Publisher
96 - 96x96 dpi display font Ventura Publisher
@@@ - Screen files used in installation or instructions
A.D. /B.C. - Macintosh Assembly Source Code
A00 - Archive Section of a file distributed by archives
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