The National Transportation Safety Board (NTSB) uses "RAR" to designate official accident reports. For example:
The thirteenth cycle is currently accepting applications for grants between $10,000 and $50,000 CLIR . 22307.rar
To preserve rare audio and visual recordings of high scholarly value CLIR . 4. Medical/Afferent Fibers (RARs) The National Transportation Safety Board (NTSB) uses "RAR"