Complex sentence: Rather than being manufactured from full, parallel veneers, PSL uses veneers with more defects in a more random-looking pattern, and LSL uses smaller veneers, and so is similar to oriented strand board (OSB) in appearance.
Split into simpler sentences: Rather than being manufactured from full, parallel veneers, Parallel Strand uses veneers with more defects in a more random-looking pattern. Laminated strand lumber (LSL) is another similar type that uses smaller veneers, and so is similar to oriented strand board (OSB) in appearance.