http://fileformats.archiveteam.org/index.php?action=history&feed=atom&title=Microsoft_SZ_installation_compression Microsoft SZ installation compression - Revision history 2026-04-17T03:53:13Z Revision history for this page on the wiki MediaWiki 1.19.2 http://fileformats.archiveteam.org/index.php?title=Microsoft_SZ_installation_compression&diff=50934&oldid=prev Jsummers: /* Sample files */ 2025-08-23T14:11:48Z <p>‎<span dir="auto"><span class="autocomment">Sample files</span></span></p> <table class='diff diff-contentalign-left'> <col class='diff-marker' /> <col class='diff-content' /> <col class='diff-marker' /> <col class='diff-content' /> <tr valign='top'> <td colspan='2' style="background-color: white; color:black;">← Older revision</td> <td colspan='2' style="background-color: white; color:black;">Revision as of 14:11, 23 August 2025</td> </tr><tr><td colspan="2" class="diff-lineno">Line 28:</td> <td colspan="2" class="diff-lineno">Line 28:</td></tr> <tr><td class='diff-marker'>&#160;</td><td style="background: #eee; color:black; font-size: smaller;"><div>* Examples of SZ files may be found in packages containing a decompression utility; see the Software section.</div></td><td class='diff-marker'>&#160;</td><td style="background: #eee; color:black; font-size: smaller;"><div>* Examples of SZ files may be found in packages containing a decompression utility; see the Software section.</div></td></tr> <tr><td class='diff-marker'>&#160;</td><td style="background: #eee; color:black; font-size: smaller;"><div>* [https://winworldpc.com/product/ms-dos/50 WinWorld: MS-DOS 5.0] → &quot;Microsoft MS-DOS 5.00 (Beta 5.0.224)&quot; → ... → *.??$</div></td><td class='diff-marker'>&#160;</td><td style="background: #eee; color:black; font-size: smaller;"><div>* [https://winworldpc.com/product/ms-dos/50 WinWorld: MS-DOS 5.0] → &quot;Microsoft MS-DOS 5.00 (Beta 5.0.224)&quot; → ... → *.??$</div></td></tr> <tr><td colspan="2">&#160;</td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div><ins style="color: red; font-weight: bold; text-decoration: none;">* Example of a split file: ({{DiscMasterLink|browse/33120/ibm0010-0019/ibm0010.tar/ibm0010/QC25-02.ZIP|QC25-02.ZIP}} → QC.HL$) + ({{DiscMasterLink|browse/33120/ibm0010-0019/ibm0010.tar/ibm0010/QC25-03.ZIP|QC25-03.ZIP}} → QC.HL2)</ins></div></td></tr> <tr><td class='diff-marker'>&#160;</td><td style="background: #eee; color:black; font-size: smaller;"></td><td class='diff-marker'>&#160;</td><td style="background: #eee; color:black; font-size: smaller;"></td></tr> <tr><td class='diff-marker'>&#160;</td><td style="background: #eee; color:black; font-size: smaller;"><div>[[Category:Microsoft]]</div></td><td class='diff-marker'>&#160;</td><td style="background: #eee; color:black; font-size: smaller;"><div>[[Category:Microsoft]]</div></td></tr> <tr><td class='diff-marker'>&#160;</td><td style="background: #eee; color:black; font-size: smaller;"><div>[[Category:MS-DOS]]</div></td><td class='diff-marker'>&#160;</td><td style="background: #eee; color:black; font-size: smaller;"><div>[[Category:MS-DOS]]</div></td></tr> </table> Jsummers http://fileformats.archiveteam.org/index.php?title=Microsoft_SZ_installation_compression&diff=50933&oldid=prev Jsummers: /* Software */ 2025-08-23T12:51:09Z <p>‎<span dir="auto"><span class="autocomment">Software</span></span></p> <table class='diff diff-contentalign-left'> <col class='diff-marker' /> <col class='diff-content' /> <col class='diff-marker' /> <col class='diff-content' /> <tr valign='top'> <td colspan='2' style="background-color: white; color:black;">← Older revision</td> <td colspan='2' style="background-color: white; color:black;">Revision as of 12:51, 23 August 2025</td> </tr><tr><td colspan="2" class="diff-lineno">Line 23:</td> <td colspan="2" class="diff-lineno">Line 23:</td></tr> <tr><td class='diff-marker'>&#160;</td><td style="background: #eee; color:black; font-size: smaller;"><div>* {{OldskoolDOSEXE}} → Compiler pack → microsoft/quickbasic-4.50.rar → quickbasic-4.50/1400k disks/UNPACK.EXE - &quot;Microsoft BASIC Unpack Utility - Version 1.10&quot; (decompression only)</div></td><td class='diff-marker'>&#160;</td><td style="background: #eee; color:black; font-size: smaller;"><div>* {{OldskoolDOSEXE}} → Compiler pack → microsoft/quickbasic-4.50.rar → quickbasic-4.50/1400k disks/UNPACK.EXE - &quot;Microsoft BASIC Unpack Utility - Version 1.10&quot; (decompression only)</div></td></tr> <tr><td class='diff-marker'>&#160;</td><td style="background: #eee; color:black; font-size: smaller;"><div>* [https://www.cabextract.org.uk/libmspack/ libmspack]</div></td><td class='diff-marker'>&#160;</td><td style="background: #eee; color:black; font-size: smaller;"><div>* [https://www.cabextract.org.uk/libmspack/ libmspack]</div></td></tr> <tr><td colspan="2">&#160;</td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div><ins style="color: red; font-weight: bold; text-decoration: none;">* {{Deark}}</ins></div></td></tr> <tr><td class='diff-marker'>&#160;</td><td style="background: #eee; color:black; font-size: smaller;"></td><td class='diff-marker'>&#160;</td><td style="background: #eee; color:black; font-size: smaller;"></td></tr> <tr><td class='diff-marker'>&#160;</td><td style="background: #eee; color:black; font-size: smaller;"><div>== Sample files ==</div></td><td class='diff-marker'>&#160;</td><td style="background: #eee; color:black; font-size: smaller;"><div>== Sample files ==</div></td></tr> </table> Jsummers http://fileformats.archiveteam.org/index.php?title=Microsoft_SZ_installation_compression&diff=47913&oldid=prev Jsummers at 18:49, 12 February 2024 2024-02-12T18:49:11Z <p></p> <table class='diff diff-contentalign-left'> <col class='diff-marker' /> <col class='diff-content' /> <col class='diff-marker' /> <col class='diff-content' /> <tr valign='top'> <td colspan='2' style="background-color: white; color:black;">← Older revision</td> <td colspan='2' style="background-color: white; color:black;">Revision as of 18:49, 12 February 2024</td> </tr><tr><td colspan="2" class="diff-lineno">Line 26:</td> <td colspan="2" class="diff-lineno">Line 26:</td></tr> <tr><td class='diff-marker'>&#160;</td><td style="background: #eee; color:black; font-size: smaller;"><div>== Sample files ==</div></td><td class='diff-marker'>&#160;</td><td style="background: #eee; color:black; font-size: smaller;"><div>== Sample files ==</div></td></tr> <tr><td class='diff-marker'>&#160;</td><td style="background: #eee; color:black; font-size: smaller;"><div>* Examples of SZ files may be found in packages containing a decompression utility; see the Software section.</div></td><td class='diff-marker'>&#160;</td><td style="background: #eee; color:black; font-size: smaller;"><div>* Examples of SZ files may be found in packages containing a decompression utility; see the Software section.</div></td></tr> <tr><td colspan="2">&#160;</td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div><ins style="color: red; font-weight: bold; text-decoration: none;">* [https://winworldpc.com/product/ms-dos/50 WinWorld: MS-DOS 5.0] → &quot;Microsoft MS-DOS 5.00 (Beta 5.0.224)&quot; → ... → *.??$</ins></div></td></tr> <tr><td class='diff-marker'>&#160;</td><td style="background: #eee; color:black; font-size: smaller;"></td><td class='diff-marker'>&#160;</td><td style="background: #eee; color:black; font-size: smaller;"></td></tr> <tr><td class='diff-marker'>&#160;</td><td style="background: #eee; color:black; font-size: smaller;"><div>[[Category:Microsoft]]</div></td><td class='diff-marker'>&#160;</td><td style="background: #eee; color:black; font-size: smaller;"><div>[[Category:Microsoft]]</div></td></tr> <tr><td colspan="2">&#160;</td><td class='diff-marker'>+</td><td style="background: #cfc; color:black; font-size: smaller;"><div><ins style="color: red; font-weight: bold; text-decoration: none;">[[Category:MS-DOS]]</ins></div></td></tr> </table> Jsummers http://fileformats.archiveteam.org/index.php?title=Microsoft_SZ_installation_compression&diff=45187&oldid=prev Jsummers: /* Software */ 2023-09-01T14:19:09Z <p>‎<span dir="auto"><span class="autocomment">Software</span></span></p> <table class='diff diff-contentalign-left'> <col class='diff-marker' /> <col class='diff-content' /> <col class='diff-marker' /> <col class='diff-content' /> <tr valign='top'> <td colspan='2' style="background-color: white; color:black;">← Older revision</td> <td colspan='2' style="background-color: white; color:black;">Revision as of 14:19, 1 September 2023</td> </tr><tr><td colspan="2" class="diff-lineno">Line 21:</td> <td colspan="2" class="diff-lineno">Line 21:</td></tr> <tr><td class='diff-marker'>&#160;</td><td style="background: #eee; color:black; font-size: smaller;"><div>== Software ==</div></td><td class='diff-marker'>&#160;</td><td style="background: #eee; color:black; font-size: smaller;"><div>== Software ==</div></td></tr> <tr><td class='diff-marker'>&#160;</td><td style="background: #eee; color:black; font-size: smaller;"><div>* [https://archive.org/details/DrWindows3 Dr. Windows 3] → dr win3/DATABASE/ACCSDBS.ZIP → COMPRESS.EXE - &quot;A lzw 1 Compression Utility - Version 1.00&quot; (compression and decompression)</div></td><td class='diff-marker'>&#160;</td><td style="background: #eee; color:black; font-size: smaller;"><div>* [https://archive.org/details/DrWindows3 Dr. Windows 3] → dr win3/DATABASE/ACCSDBS.ZIP → COMPRESS.EXE - &quot;A lzw 1 Compression Utility - Version 1.00&quot; (compression and decompression)</div></td></tr> <tr><td class='diff-marker'>−</td><td style="background: #ffa; color:black; font-size: smaller;"><div><del style="color: red; font-weight: bold; text-decoration: none;">** {{DiscMasterLink|browse/7313/dr%20win3.zip/dr%20win3/DATABASE/ACCSDBS.ZIP|ACCSDBS.ZIP at DiscMaster}}</del></div></td><td colspan="2">&#160;</td></tr> <tr><td class='diff-marker'>&#160;</td><td style="background: #eee; color:black; font-size: smaller;"><div>* {{OldskoolDOSEXE}} → Compiler pack → microsoft/quickbasic-4.50.rar → quickbasic-4.50/1400k disks/UNPACK.EXE - &quot;Microsoft BASIC Unpack Utility - Version 1.10&quot; (decompression only)</div></td><td class='diff-marker'>&#160;</td><td style="background: #eee; color:black; font-size: smaller;"><div>* {{OldskoolDOSEXE}} → Compiler pack → microsoft/quickbasic-4.50.rar → quickbasic-4.50/1400k disks/UNPACK.EXE - &quot;Microsoft BASIC Unpack Utility - Version 1.10&quot; (decompression only)</div></td></tr> <tr><td class='diff-marker'>&#160;</td><td style="background: #eee; color:black; font-size: smaller;"><div>* [https://www.cabextract.org.uk/libmspack/ libmspack]</div></td><td class='diff-marker'>&#160;</td><td style="background: #eee; color:black; font-size: smaller;"><div>* [https://www.cabextract.org.uk/libmspack/ libmspack]</div></td></tr> </table> Jsummers http://fileformats.archiveteam.org/index.php?title=Microsoft_SZ_installation_compression&diff=43736&oldid=prev Jsummers: Created page with "{{FormatInfo |formattype=electronic |subcat=Compression |extensions={{ext|??$}} |wikidata={{wikidata|Q105851650}} |released=≤1990 }} '''Microsoft SZ installation compression..." 2022-12-20T17:17:38Z <p>Created page with &quot;{{FormatInfo |formattype=electronic |subcat=Compression |extensions={{ext|??$}} |wikidata={{wikidata|Q105851650}} |released=≤1990 }} &#039;&#039;&#039;Microsoft SZ installation compression...&quot;</p> <p><b>New page</b></p><div>{{FormatInfo<br /> |formattype=electronic<br /> |subcat=Compression<br /> |extensions={{ext|??$}}<br /> |wikidata={{wikidata|Q105851650}}<br /> |released=≤1990<br /> }}<br /> '''Microsoft SZ installation compression''' refers to a compressed file format that was used by some Microsoft software distributions.<br /> <br /> It is presumably an early version of the [[MS-DOS installation compression]] formats. The libmspack documentation calls it the &quot;QBasic variant&quot;.<br /> <br /> == Discussion ==<br /> One of the SZ utilities calls itself &quot;lzw 1 Compression Utility&quot;. However, the format does not use [[LZW]] compression. It uses [[LZSS (Haruhiko Okumura)|Okumura's LZSS]].<br /> <br /> == Identification ==<br /> Files start with bytes {{magic|53 5a 20 88 f0 27 33}}. This is normally followed by &lt;code&gt;d1&lt;/code&gt;, but other values are used by the file splitting feature, for fragments after the first one.<br /> <br /> == Specifications ==<br /> * [https://www.cabextract.org.uk/libmspack/doc/szdd_kwaj_format.html libmspack: COMPRESS.EXE file formats]<br /> <br /> == Software ==<br /> * [https://archive.org/details/DrWindows3 Dr. Windows 3] → dr win3/DATABASE/ACCSDBS.ZIP → COMPRESS.EXE - &quot;A lzw 1 Compression Utility - Version 1.00&quot; (compression and decompression)<br /> ** {{DiscMasterLink|browse/7313/dr%20win3.zip/dr%20win3/DATABASE/ACCSDBS.ZIP|ACCSDBS.ZIP at DiscMaster}}<br /> * {{OldskoolDOSEXE}} → Compiler pack → microsoft/quickbasic-4.50.rar → quickbasic-4.50/1400k disks/UNPACK.EXE - &quot;Microsoft BASIC Unpack Utility - Version 1.10&quot; (decompression only)<br /> * [https://www.cabextract.org.uk/libmspack/ libmspack]<br /> <br /> == Sample files ==<br /> * Examples of SZ files may be found in packages containing a decompression utility; see the Software section.<br /> <br /> [[Category:Microsoft]]</div> Jsummers