I need to know the differences and the applications between these woods/plywoods please:

acx
cdx
doug fir
composite
fiberboard
pressed board
plybead
BC pine

Thank you.

 

The plywood types that include letter designations are the grade of the two faces: acx indicates one face is "a" (no defects, etc) and the flip side is "c" (some defects, knots, etc). the x indicates exterior grade. BC pine would be a plywood of pine with a "b" grade side and a "c" grade side. The higher the grade, normally the more expensive the plywood.

The other types listed are generally sheet materials mande from wood by-products, i.e. wood chips, etc.

Check this link for more info:

http://www.apawood.org/