Model:48GII, page is based on 39G+, calculator is based on 48GGeneral:Name:?Code-Name:Mid AppleFamily:ChaglemangeLogic:algegraic, RPL, textbookFeatures:?Firsts:infinite precision integers (w/49G+)Introduction:Date:2003-10-28Price:$130Discontinuation:Date:in productionPrice:?Production-Run:?Display:Type:LCD, bit-mappedSize:64 x 131 pixelsNumber-Formats:sign, 12 mantissa, ., exp sign, 3 expAnnunciators:?Data:User-Visible:Smallest:1E-499Largest:9.99999999999E499Signif.-Digits:12Internal:Smallest:1E-49999Largest:9.99999999999999E49999Signif.-Digits:15Data-Types-and-Sizes:real, 11 bytes?infinite precision for integerssymbolic matricesMemory:Named-Registers:n/aFlags:256 totalRegister-Usage:n/aNumbered-Registers:?Program-Steps:n/aProgram-Editing:insert?Program-Display:alphaUser-RAM-Bytes:128KTotal-RAM-Bytes:128KROM-Bytes:?Machine-State:memoryFile-Types:nonePhysical:Technology-Used:?Processor:48MHz ARM9Chip-Count:?Power-Source:AAA x 3 + CR2032Continuous-Memory:yesExpansion-Ports:noneI/O-Ports:Irda, RS232Clock:?Length:184.0 mmWidth:87.0 mmHeight:23.5 mmWeight:220gTemperature-Range:Operating:?Charging:?Storage:?Keyboard:Switches:noneShift-Keys:Shift Left, black, above leftShift Right, red, above rightAlpha, blue, rightUser-Defined-Keys:allKey-Arrangement::** ** ** ** ** **** **    **      **    **** **    **** ** ** ** **** ** ** ** **** ** ** ** **** ** ** ** **** ** ** ** **** ** ** ** **** ** ** ** **Key-Labels-Base-Keyboard::F1F2F3F4F5F6APPSMODETOOL^<>VARSTO>NXTvHISTEVAL'SYMB<- xY\v/xSINCOSTANEEX+/-X1/X\:-ALPHA789xshft l456-shft r123+ON0.SPCENTERCANCEL key in black below ONKey-Labels-Shift-Left-black-above-left::Y=WINGRAPH2D/3DTBLSETTABLEFILESCUSTOM;[][][]UPDIRRCLPREV[]CMDPRGMTRWMTHDEL x 2exASINACOSATAN  x10\=/=<>=ABSUSERS.SLVEXP&LNFINANCE[] (brackets)[]CALCMATRICES CONVERT ()[]ARITHDEF#{}CONT\oo::\piANSKey-Labels-Shift-Right-red-above-left::[][][][][][]BEGINEND|[][][]COPYCUTPASTE[]UNDOCHARSEQWCATCLEARLNx\v/y\GS\Gd\.SLOG\<>ARGENTRYNUM.SLVTRIGTIME""[]ALGSTATUNITS_[]CMPLXLIBBASE<< >>OFF-><-|'->NUMKey-Labels-Alpha-black-right::ABCDEFGHI[][][]JKL[]MNOP[]QRSTUVWXY[][][][][][][][][][][][][][][][][][][][][]The "Z" key appears to be missing, although that could be due to thequality of the photograph that I worked from.Programmable-Operations::Vector and matrix operations- rectangular/polar- matrix operations: includes symbolic matrices- matrix editor Graphing features- 2-D function, polar, parametric plot- 3-D differential equation, bar plot- histogram, scatter plot- find: intersect, extremum, slope, area- zoom, trace, co-ordinates, shadeMath features- +, -, x, \:-, \v/, 1/x, +/-, ln, e^x, x\v/y- y^x, log, 10^x, x^2, %, \pi, n!- fractions- degrees, radians, or grads mode- trignonometric functions/inverses- hyperbolics/inverses- HP Solve application (root finder)- numeric integration- symbolic integration (simple cases)- numeric differentiation- symbolic differentiation (simple cases)- complex number functions- polynomial root finder, Taylor series- absolute value, round- integer & fractional part of a number- modulo function, floor, ceiling- CAS systemScientific Features- decimal hrs/hrs min sec conversions- polar/rectangular conversions- angle conversions- base conversions and arithmetic- unit conversions- bit, Boolean graphics- display and printer graphics- onboard library with more than 180 scientific and engineering  constants and unitsStatistical Features- \GSx, \GSx^2, \GSy, \GSy^2, \GSxy- sample standard deviation, mean- population standard deviation- linear regression- combinations, permutations- weighted mean- edit, save, name, list- curve fit (lin, log, exp, pow)- plot statistical data- hypothesis tests- confidence intervalsProgramming Features- root finder: HP Solve- number of programs/formulae: memory- levels of subroutines: memory- branching- alpha prompts in programs- input forms, alpha string manipulation- indirect addressing- index looping- alpha listing- menus, prompts- alpha messages- user mode / redefinable keyboardOther- notepad- graphics functions with interactive graphics- over 2300 built-in functionsNon-Programmable-Operations::?Menus::?Bugs/ROM-Versions::noneNotes::Manufactured by Kinpo (http://www.kinpo.com.tw).Expanded to 256k in 2008.  It also now has both serial and USB ports.Power is now 4 AAA cells.