The following units for quantity are used in IMP*.ASC for 1972-1988 (the abbreviations may appear as upper-case or lower-case in IMP*.ASC). AOZ Avoirdupois ounce BBL Barrel BFT Board feet BU Bushel C One hundred CAR Carot CD Cord CFT Cubic feet CLB Content pound CRT Crate CTN Content ton CUR Curie CWT Hundredweight (100 pounds) CYD Cubic Yard DOZ Dozen DPC Dozen Pieces DPR Dozen Pair GAL Gallon GBX Gross boxes GR Gross GRL Gross lines GM Gram GTN Gross ton JWL Jewels LB Pound LF Leaf LFT Linear Foot LTN Long ton (2,240 pounds) LYD Long yard M Thousand (1,000) MBF Thousand board feet MC Milli-Curie MCF Thousand cubic feet MFT Thousand feet MLF Thousand linear feet MSF Thousand square feet NO Number PC Piece PFG Proof gallon PK Pack PR Pair SFT Square foot SQ Square SQI Square inch STN Short ton (2,000 pounds) SUF Superficial foot SYD Square yard TON Long Ton (2,240 pounds) TOZ Troy ounce YD Yard