Hi John,
I used File Buddy to search for "reader" on my main drive. This is everything it returned that relates to the Acrobat Reader X:
/Applications/Adobe Reader.app
/Library/Application Support/Adobe/Help/en_US/Adobe Reader
/Library/Application Support/Adobe/Acrobat/com.adobe.Reader
/Users/retoucher/Library/Caches/com.adobe.Reader
/Users/retoucher/Library/Caches/com.adobe.Reader.ARM
/Users/retoucher/Library/Application Support/Expression Media/Plug-ins/Helper Applications/Adobe Reader
/Users/retoucher/Library/Receipts/com.adobe.Reader
/Users/retoucher/Library/Preferences/com.adobe.Reader_x86_9.0.plist
/Users/retoucher/Library/Logs/Adobe/Adobe Reader Updater.log
/Users/retoucher/Library/Preferences/com.adobe.Reader.plist
/private/var/root/Library (from old Mac)/Receipts/com.adobe.Reader
The only one that isn't readily accessible is the .plist file in the /private/var/... folder. But it's only 29Kb.
For the most part, Mac apps don't spread themselves as pervasively as they do in Windows. Larger apps like Photoshop (or the Adobe suites), Final Cut Studio, Quark, etc., tend to drop more stuff around the drive in the System or main Library folders. But for smaller apps, they tend to be the main app, a few things in the Application Support folders, and a preference file (or a few of them).