Casio fx-5000F

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/log 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: Li-ion rechargeable battery
Lreg: Linear regression (2-var. stats)
mA: Milliamperes of current
Mtrx: Matrix support
NiCd: Nickel-Cadmium recharg. batt.
NiMH: Nickel-metal-hydrite rech. batt.
Prnt: Printer
RTC: Real-time clock
Sdev: Standard deviation (1-var. stats)
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: 1987  Display type: Numeric display  
New price:   Display color: Black  
    Display technology: Liquid crystal display 
Size: 5"×3"×½" Display size: 10+2 digits and 14 characters
Weight: 4 oz    
    Entry method: Algebraic with precedence 
Batteries: 2×"CR-2032" Lithium Advanced functions: Trig Exp Hyp Lreg Cmem BaseN Const Eqlib 
External power:   Memory functions:  
I/O:      
    Programming model: Formula programming 
Precision: 12 digits Program functions:  
Memories: 10 numbers Program display: Formula display  
Program memory: 675 program steps Program editing: Formula entry  
Chipset:   Forensic result:  

Casio fx-5000F

fx5000f.jpg (22970 bytes)Another interesting Casio calculator: this one provides, in addition to a fairly generous 675-step formula memory, up to 128 built-in formulae from a variety of scientific disciplines. Although the programming model is simplistic (straightforward mathematical formulae can be stored, but there is no conditional evaluation, loops, or other true programming features) the machine lacks the limitations found on many similar calculators: for instance, an individual formula can occupy all available room in formula memory. Thanks to this, it is actually possible to implement something as complex as the Gamma function on this device: 

(1+76.18009173/(Ans+1)-86.50532033/(Ans+2)+
24.01409824/(Ans+3)-1.231739572/(Ans+4)+
1.208650974E-3/(Ans+5)-5.395239385E-6/(Ans+6))
√2π/Ans×(Ans+5.5)xy(Ans+.5)/e(Ans+5.5)

The method used here makes the formula operate on the result of any previous calculation, rather than prompting for the values of any independent variables.