S4S - Smooth on 4 sides
S1S2E - Smooth 1 side and 2 edges
ROUGH - Saw texture direct from the Mill
GREEN - Contains moisture
DRY - Kiln-dried or Air-dried
RESAWN - Light blade texture, between rough & smooth
RB&B - Reverse board and batten
T&G - Tongue and groove
ACQ - Alkaline Copper Quaternary, a water-based wood preservative that             prevents decay from fungi and insects
KD- Kiln-dried
P&TS - Plugged and touch sanded, plywood
STK - Select tight knot
SPF - Spruce/Pine/Fir mixed species
MDO - Medium Density Overlay, aka Sign Board or Crezon. A paper               covered fiberboard with on every smooth side often used for              making signs
MDF - Medium Density Fiberboard
OSB - Oriented Strand Board
WP4 - A standard siding pattern
S4SEE - Smooth 4 Sides, Eased Edge
S3SE2E - Smooth 3 Sides, Eased 2 Edges
RS1S - Resawn 1 Side
OC - On Center, distance between centers of a repeating pattern
PVC - Polyvinyl Chloride
LVL - Laminated Veneer Lumber, an engineered lumber product
PSL - Parallel Strand Lumber, an engineered lumber product
LSL - Laminated Strand Lumber, an engineered lumber product.
LOSP - Light Organic Solvent Preservative, treatment used to protect               against termite damage and decay, inside or outside above               ground.