5021-8943LaserJet quick reference guide - Covers LaserJet Classic, II series, III series, 4 sereis, 5 series, 6 series and 5Si - Volume 1 of 2 volume set
5090-3390LaserJet Quick Reference Guide - Covers 1100, 2100, 3100, 4000, 5000 and 8000 series printeres - Volume 2 of 2 volume set