diff --git a/doc/useful_addresses.html b/doc/useful_addresses.html
index d0383271..cd264ff1 100644
--- a/doc/useful_addresses.html
+++ b/doc/useful_addresses.html
@@ -29,12 +29,35 @@ I&#178C Linux kernel module</A>
 <LI><A HREF="http://www.sbs-forum.org/specs/index.html">SMBus specification
 documents</A>
 </UL>
+<LI>I&#178C and SMBus implementations
+<UL>
+<LI><A HREF="http://www.intel.com">Intel PIIX4 (82371AB)</A>
+<BR>Intel SMBus adapter, integrated with many other functions. There
+are <A HREF="http://developer.intel.com/design/pcisets/datashts/">datasheet
+for most chipsets</A>.
+<LI><A HREF="www.via.com.tw">VIA South Bridge (VT85C586B)</A>
+<BR>VIA I&#178C adapter, integrated with many other functions. There is
+a separate <A HREF="http://www.via.com.tw/support/datasheets.html">section
+with datasheets</A>.
+<BR>
+</UL>
 <LI>Hardware monitoring chips
 <UL>
 <LI><A HREF="http://www.national.com">National Semiconductors</A>
-<BR>LM75/78/79/80 reference sheets
+<BR>LM75/78/79/80 
+<A HREF="http://www.national.com/catalog/AnalogTempSensors.html">reference
+sheets</A>.
 <LI><A HREF="http://www.winbond.com.tw">Winbond</A>
 <BR>W83781D reference sheet
+<LI><A HREF="http://www.analog.com">Analog Devices</A>
+<LI><A HREF="http://www.linear.com">Linear Technologies</A>
+</UL>
+<LI>Other protocol information
+<UL>
+<LI><A HREF="http://developer.intel.com/design/servers/ipmi/">IPMI
+documentation</A>
+<BR>Intelligent Platform Management Interface, a standard for hardware
+monitor chip reading
 </UL>
 <LI>Hardware monitoring implementations
 <UL>