LVL, LVB and LVD (plywood) are all multi-layer boards, which are wood based boards pressed with multi-layer veneer and bonded with glue.
LVL, laminated veneer lumber, is the board arranged with the direction of fiber veneer unidirectional and parallel. It optimizes the use of products like beam and other building construction materials. Structurally, LVL has better strength in vertical applications because most of the direction of fiber is unidirectional. It's widely used for glass packaging, heavy machinery packaging, furniture, construction, etc.
LVB, laminated veneer board, is the board arranged with the direction of fiber veneer both horizontal and vertical. Different from LVL veneer arrangement, LVB has similar veneer arrangement as LVD but also has a cross-section arrangement of more than 30%, such as 3 horizontal layers, 2 vertical layers and 3 horizontal layers again. LVB is more powerful in horizontal applications because of the transverse fiber that sustains the tensile force that makes the board more flat. LVB is commonly applied in furniture production.