Casio RM-9850G

Datasheet legend
Ab/c: Fractions calculation
AC: Alternating current
BaseN: Number base calculations
Card: Magnetic card storage
Cmem: Continuous memory
Cond: Conditional execution
Const: Scientific constants
Cplx: Complex number arithmetic
DC: Direct current
Eqlib: Equation library
Exp: Exponential/logarithmic functions
Fin: Financial functions
Grph: Graphing capability
Hyp: Hyperbolic functions
Ind: Indirect addressing
Intg: Numerical integration
Jump: Unconditional jump (GOTO)
Lbl: Program labels
LCD: Liquid Crystal Display
LED: Light-Emitting Diode
Li-ion: Lithium-ion rechargeable battery
Lreg: Linear regression (2-variable statistics)
mA: Milliamperes of current
Mtrx: Matrix support
NiCd: Nickel-Cadmium rechargeable battery
NiMH: Nickel-metal-hydrite rechargeable battery
Prnt: Printer
RTC: Real-time clock
Sdev: Standard deviation (1-variable statistics)
Solv: Equation solver
Subr: Subroutine call capability
Symb: Symbolic computing
Tape: Magnetic tape storage
Trig: Trigonometric functions
Units: Unit conversions
VAC: Volts AC
VDC: Volts DC
Years of production: 1996  Display type: Graphical display  
New price:   Display color: Color  
    Display technology: Color liquid crystal display 
Size: 7"×3½"×½" Display size: 128×64 pixels
Weight: 9 oz    
    Entry method: Formula entry 
Batteries: 4×"AAA" alkaline + 1×"CR-2032" Lithium Advanced functions: Trig Exp Hyp Lreg Grph Ab/c Cplx Cmem Mtrx BaseN 
External power:   Memory functions:  
I/O: Casio I/O     
    Programming model: Formula programming 
Precision: 15 digits Program functions: Jump Cond Subr Lbl Ind  
Memories: 28(0) kilobytes Program display: Formula display  
Program memory: 28 kilobytes Program editing: Formula entry  
Chipset:   Forensic result:  

rm9850g.jpg (31976 bytes)The RM-9850G is special version of the CFX-9850G graphing calculator from Casio, featuring an infrared interface for controlling an overhead display unit.

Demonstrating the programming model and functionality of this calculator is the program below, computing the logarithm of the Gamma function for any real argument for which a real result exists:

ln (2.506628283501+92.20704845211÷X-
    .2208497079533÷(X+3))+(X-.5)ln (X+3.85)-X-3.85->G
S<0=>ln (-π÷X÷sin πX)-G->G