.4ファイル拡張子
.4ファイルを開くには？
IBM Embedded ViaVoice Voice Type Languages Scripts Data File Format
| Ads | OS | Software |
|---|---|---|
| WINDOWS |
 IBM Embedded ViaVoice |
Salt Lake City Game Music
| OS | Software |
|---|---|
| WINDOWS |
Salt Lake Winter Olympics 2002 |
Unformatted Manual Page (Roff/nroff/troff/groff)
| OS | Software |
|---|---|
| Linux |
 Unix |
GNU Screen Log
| OS | Software |
|---|---|
| Linux |
GNU Screen |