What are all the file extensions that END in the letter R?

My husband and I have a child whose initials ended up being RAR. Because of this, my husband thinks it would be cool to name our subsequent children so that their initials will also be computer extensions.
The only other one that I know of that ends in R is the Adobe Brush File - ABR.

Could someone find me a list of some/all/any? lol. Trying to narrow down name choices based on file extensions will be interesting, so the more you can find, the better!

Unless one person posts with a HUGE list, I will split up the answer to everyone who posts (different) extensions. :)

Thanks so much!
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That's crazy, but kind of cool.  This might get you started...
jar — ZIP file with manifest for use with Java applications.
tar --- Tape Archive
LBR --- Library file
LQR --- LBR Library file compressed by the SQ program.
PAR --- Solidedge Part
APR --- Lotus Approach data entry & reports
APR --- (ESRI ArcView 3.3 and earlier project file)
PXR --- Pixar Image Computer image file
CDR --- CorelDRAW vector image
XAR --- Xara Drawing
.EAR --- files, archives of Java enterprise applications
.WAR --- files, archives of Java Web applications
BUFR ---- WMO format for weather observation data
BKR --- The EEG data format developed at the University of Technology Graz
MFER --- Medical waveform Format Encoding Rules ISO/TS 11073-92001:2007.
BKR --- The EEG data format developed at the University of Technology Graz
CPR --- Steinberg Cubase project file
NPR --- Steinberg Nuendo project file
DPR ---Pascal source projects
XLR --- Microsoft Works version 6.0
FLR --- (text file which contains scripts extracted from SWF by a free ActionScript decompiler named FLARE)
UNR --- Map format for Unreal
POR --- So called "portable" SPSS files, readable by PSPP
CUR --- Cursor Files

Now, if you would be so kind as to give me the names that can go along with these ;)  We'll use the last name of Radical to protect the innocent.

I'll get you started... Jason Adam Radical...

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Wikipedia has a very useful and easily navigated list of file formats:
Yep, Michael is right.  That's where I pulled my list from.  I just ran them through a little filter to find the ones that ended in R...
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