Model:-56AGeneral:Name:noneCode-Name:?Family:?Classic-PrinterLogic:RPNFeatures:scientificFirsts:?printer, no displayIntroduction:Date:1973-4Price:?Discontinuation:Date:?Price:?Production-Run:?Display:Type:?Size:?Number-Formats:?Annunciators:?Data:User-Visible:Smallest:1E-99Largest:9.999999999E99Signif.-Digits:10Internal:Smallest:1E-99Largest:9.999999999E99Signif.-Digits:10Data-Types-and-Sizes:real, 7 bytesMemory:Named-Registers:X, Y, Z, T, Last x1-9Flags:noneRegister-Usage:?Numbered-Registers:?Program-Steps:?Program-Editing:?Program-Display:?User-RAM-Bytes:?Total-RAM-Bytes:?ROM-Bytes:?Machine-State:?File-Types:nonePhysical:Technology-Used:?Processor:?Chip-Count:?Power-Source:?Continuous-Memory:noExpansion-Ports:noneI/O-Ports:noneClock:noneLength:?Width:?Height:?Weight:?Temperature-Range:Operating:? to ? deg CCharging:-Storage:? to ? deg CKeyboard:Switches:?Shift-Keys:?User-Defined-Keys:?Key-Arrangement::?Key-Labels-Base-Keyboard::?Programmable-Operations::noneNon-Programmable-Operations::?Menus::noneBugs/ROM-Versions::?Notes::This product number is listed on the HP web site(http://www.hp.com/calculators) on 2000-11-05.  No real information isknown.  Some information is inhttp://www.hpmuseum.org/designs/designs.htm