WK4file extension is for Lotus 1-2-3 version 3.4 Spreadsheet
Similar to WK4
$00 - DOS Pipe file $1 - ZX Spectrum file in HOBETA format $D$ - Data OS/2 Planner $DB - Temporary file dBASE IV $ED - Editor temporary file MS C $LN - TLink response file Borland C++ $O1 - Pipe file DOS