I believe the only official acronym is DAS, which stands for Disability Access Service. Disney defines it as one of our programs offered at the theme parks intended to accommodate those Guests who, due to a developmental disability like autism or similar, are unable to wait in a conventional queue for an extended period of time.
Other acronyms are more social media shorthand:
AQR = Attraction Queue Re-entry; there may be times when a Guest must briefly step out of the standby queue and then rejoin their party. Every attraction has a defined process to support this option based on a person’s disability while the rest of the party remains in the queue.
RS = Rider Switch (or Rider Swap); Guests can wait with member(s) of their party who aren’t riding due to any of the reasons listed. Once the first Guest returns the waiting Guest can board the attraction without having to wait in the regular line again.
LRT = Location Return Time (aka wheelchair return time); This program is intended to accommodate persons with mobility devices or other physical restrictions who are unable to negotiate some of our older queues which may not be wheelchair accessible.
SAW = stroller-as-wheelchair; This tag allows a Guest to treat their stroller as a wheelchair and keep their device with them in attraction queues.
More details about the above offerings can be found on the
Disneyland website.
RTQ = return to queue -- this is not an official disability offering, though social media frequently uses this term/acronym. Often it refers to what Disney calls Attraction Queue Re-entry, but sometimes it's intended more like the Location Return Time.