"P Tr" for pretrial transcript;
"Tr" for transcript;
"Nar St" for narrative statement;
"ER" for Excerpt;
"App" for Appendix;
"AR Tape No. ___, Cue No. ___" for audio record;
"PAR" for pretrial audio record;
"PDF" for PDF of agency record filed by electronic means with the Administrator;
"TCF" for trial court file;
"Rec" for record in judicial review proceedings only;
"Ex" for exhibit.
Other abbreviations may be used if explained.
Or. R. App. P. 5.20