The forum search feature is a little odd in that it refuses to search for words shorter than 4 letters.
I encountered this limitation when I tried to search for GPS.
Searching for Global Positioning System gives me no hits.
But since I knew there had been some posts about GPS I tried a google search,
http://www.google.ca/search?as_q=gps&as_epq=&as_oq=&as_eq=&as_nlo=&as_nhi=&lr=&cr=&as_qdr=all&as_sitesearch=http://forum.43oh.com&as_occt=any&safe=images&tbs=&as_filetype=&as_rights=&gbv=1&sei=dOdQUazvNMS4igK0loHgBA
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