Vintage Electronic Calculators:CALCUSEUM Home page
Overview of Brands
Main Page for this Item
HP_docu: 00028-90147 (Instr.) Owners Manual (Ed.4)AKA: HEWLETT-PACKARD, Advanced Scientific Calculator, Owner's Manual, HP-28S
(Update for 00028-90130, jun-1988; Reordened by: 00028-90066)