Top4

Top4 (also written Top 4) is a file compression utility for DOS, and associated file format. It was developed by Tobias Svensson / Topologi Software.

Identifiers
For v1.03 at least, the suggested file extension is .to4.

The v1.03 package includes a self-extracting executable maker, TOP4EXE v1.02, whose example commands use the extension .t4 for Top4 format.

Identification
Files begin with bytes.

Software

 * [ Top4 v1.03]

Links

 * Developer's website (2003 archive)