RSS — the little technology with the big, big list of acronym-expansions — has even more acronym expansions than heretofore suspected; Google definitions has the scoop:
Repetitive stress syndrome that is caused by repetitive movement (causes Carpal Tunnel Syndrome when occurs at wrist/hand)
(Regional Subscription System) The system by which U S WEST processes Equal Access information that allows end users to obtain service from their Interexchange Carrier of Choice.
Radio Science Subsystem (orbiter science investigation)
(via EvHead)