create industry terms glossary for web site

I want someone to create a glossary of industry terms for 3 industries (heating & air conditioning, electrical, plumbing) for use on my web site. This is for an overall "add additional information content to our website" for a contractor's web site. The content has to be original or taken from public domain content - no cutting and pasting from other contractor's web sites or any other possibly/probably copyrighted material. Examples: - HVAC - heating, ventilation, air conditioning - CFM - cubic feet per minute - OD - outside diameter These examples are very short explanations of abbreviations - I also want more in depth paragraph explanations for other terms or ideas. I'm not sure how many I want - several pages worth per topic (hvac, electrical, plumbing). Grammar, spelling, accuracy are very important here.