What isn't RSD?

"R"
"S"
"D"
Is it......?
Really Simple Discoverability
Roger Software Development
Radio Sailing Division
Remote Sensing Data
Russian Software Development
Recreational Sport Discussion
Route Server Daemon
Research Systems Diagnostic
Richland School District
Replay Serverside Demos
Refrigeration Supplies Distributor
Raven Shield Denmark
Recreational Scuba Diving
Resource Staff Draftsperson
Richmond Sound Design
Relative Strength Differential

I'm not being silly - no.

These are things that you find in a number of search engines when you type in the letters, "R" "S" "D" Although the disease doesn't deserve capital letters; I'll make an exception for this post.

Reflex Sympathetic Dystrophy needs to come out of the shadows and let the world know how we suffer.
http://www.rsdsa.org/
http://www.forgrace.org/