Over on the Yahoo email list there was a comment made that business people say "SAP" and "Oracle". This is true, but only because they've been made to say it. Get three sales execs in a room talking about their sales approach and strategy and you'd be amazed how often they don't say "Siebel". Get a supply chain guy chatting to a warehouse guy and its amazing how often SAP, Oracle, GLog or whatever won't pass their lips.
Business people know IT terms because we've made them learn because most of IT is too lazy to understand the business terms and its too easy just to fob people off with a brand or a code word. What the business really wants to ask for is optimisation and efficiency in their language, and SAP comes closer to doing that than the IT department that implements it.