Radio Shack EC-4033

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:   Display type: Graphical display  
New price:   Display color: Black  
    Display technology: Liquid crystal display 
Size: 4½"×3"×½" Display size: 40×23 pixels and 10+2 digits
Weight: 4 oz    
    Entry method: Formula entry 
Batteries: 2×"CR-2032" Lithium Advanced functions: Trig Exp Hyp Lreg Grph Ab/c Cmem BaseN 
External power:   Memory functions:  
    Programming model: Formula programming 
Precision: 13 digits Program functions: Jump Cond Subr Lbl Ind  
Memories: 78(26) numbers Program display: Formula display  
Program memory: 400 bytes Program editing: Formula entry  
Chipset: Casio fx-6300G   Forensic result:  

ec4033.jpg (23258 bytes)The EC-4033 is an OEM version of the Casio fx-6300G calculator. It is a pleasant shirt pocket size do-everything scientific calculator with a small graphical display, and a comprehensive programming model.

The program example here is another implementation of my favorite, the Gamma function:

1 -> Y:Lbl 1:Ans >= 0 => Goto 2:
AnsY -> Y:Ans+1:Goto 1:Lbl 2:
e(ln ((1+(76.18009172+9.5E-9)/(Ans+1)
  (Ans+.5)× ln (Ans+5.5)-Ans-5.5)/Y