These are abbreviations that you will frequently see when using/trading coupons, rebates, and refunds. If I forgot anything, Please feel free to add to this list.
AR - after rebate
B1G1 or BOGO - Buy one get one free
CRT - Cash register tape
DCRT - Dated cash register tape
DCRTC - Dated cash register tape with the price circled
DND - Do Not Double (Means the coupon is not to be doubled)
DC - Double coupon - a coupon that a grocery store doubles in value
FAR - Free after rebate
FP - Free with Purchase
HDA - Hot Deal Alert
HBA - Health & Beauty Aids
HT or HgT - Hang tags for refunds or coupons hanging on a product
ISO - in store only
NAZ - Name, address, zip code
NB - National Brand
NT WT - net weight
NED - No expiration date
OAS - One, Any Size - a coupon that is good on one item, any size
POP - proof of purchase
PP - purchase price of a product
Q or Qualifier - The proof of purchase required for a refund offer that is physically taken from the package, i.e. UPC Symbol, Box Top, etc.
SMP - specially marked packages
SF - Store form
SS - Sunday supplement coupons
Tear pad or TP - A pad of refund/rebate forms found hanging from a store shelf or display.
TMF - Try Me Free
TC - Triple coupon – a coupon that a grocery store triples in value
UPC - Universal Product Code
WSL - while supplies last
WYB - When You Buy