4SW file extension is for 4DOS Swap file




Similar to 4SW

$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
$VM - Virtual manager temporary file Windows 3.x

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