OS ID shows operating system.
It is used with Level 1 header and Level 2 header and Level 3 header.
It is used to read the information peculiar to an operating system.
OS ID
OS ID
| OS ID | Hex | Description |
| 'M' | 0x4D |
MS-DOS developped by Microsoft. Yoshi's original LHA runs in MS-DOS. |
| '2' | 0x32 |
OS/2 developped by IBM. Satoshi Hiramatsu maintains LHA for OS/2. |
| '9' | 0x39 |
OS-9 developped by Microware. |
| 'K' | 0x4B |
OS/68K Unknown for details. |
| '3' | 0x33 |
OS/386 Unknown for details. |
| 'H' | 0x48 |
Human68K which is operating system of X68000. SHARP Norio Okada maintains LHA for X680x0. |
| 'U' | 0x55 |
UNIX. Tshugio Okamoto maintains LHa for Unix. |
| 'C' | 0x43 |
CP/M developped by Gary Kildal. |
| 'F' | 0x46 |
FLEX. It seems FLEX which is operating system for 6809. |
| 'm' | 0x6D |
Macintosh developped by Apple. Kazuaki Ishizaki maintains MacLHA. |
| 'R' | 0x52 |
Runser. It seems Runser which is free operating system for FM-7. Fujitsu. |
| 'T' | 0x54 |
TownsOS developped for FM-Towns. Fujitsu. Shigeru O-izumi maintains LHAT. |
| 'X' | 0x58 |
XOSK. |
| 'w' | 0x77 |
Windows95 and compatible softwares developped by Microsoft. |
| 'W' | 0x57 |
WindowsNT and compatible softwares developped by Microsoft. |
| generic | 0x00 |
MS-DOS developped by Microsoft. |
| 'J' | 0x4A |
Java Virtual Machine proposed by Sun Microsystems. |