I believe you can find something about BeOS here:<p><a href="https:&#x2F;&#x2F;www.haiku-os.org&#x2F;legacy-docs&#x2F;bebook&#x2F;index.html" rel="nofollow">https:&#x2F;&#x2F;www.haiku-os.org&#x2F;legacy-docs&#x2F;bebook&#x2F;index.html</a>