@@ -310,8 +310,8 @@ names.
<li>z/Architecture (S/390)
<br>Manufacturer: IBM
- <br><a href="http://publibfp.dhe.ibm.com/epubs/pdf/a227832c.pdf">z/Architecture Principles of Operation</a>
- <br><a href="http://publibfp.dhe.ibm.com/epubs/pdf/dz9ar008.pdf">ESA/390 Principles of Operation</a>
+ <br><a href="https://publibfp.dhe.ibm.com/epubs/pdf/a227832c.pdf">z/Architecture Principles of Operation</a>
+ <br><a href="https://publibfp.dhe.ibm.com/epubs/pdf/dz9ar008.pdf">ESA/390 Principles of Operation</a>
<br><a href="https://refspecs.linuxbase.org/ELF/zSeries/lzsabi0_zSeries.html">Linux for z Systems ABI</a>
<br><a href="https://refspecs.linuxbase.org/ELF/zSeries/lzsabi0_s390.html">Linux for S/390 ABI</a>
</li>