Top4

File Format
Name	Top4
Ontology	Electronic File Formats Compression Top4
Extension(s)	.to4, .t4
Released	≤1996

Top4 (also written Top 4) is a file compression utility for DOS, and associated file format. It was developed by 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 'T' '4' 0x1a.

Software

• Top4 v1.03

Links

• Author's website (2002 archive)