Casio Classpad 300

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: 8"×3½"×1" Display size: 160×240 pixels
Weight: 10 oz    
    Entry method: Formula entry 
Batteries: 4×"AAA" alkaline Advanced functions: Trig Exp Hyp Sdev Grph Solv Intg Ab/c Cplx Symb Cmem 
External power:   Memory functions: +/-/×/÷ 
I/O: USB     
    Programming model: Formula programming 
Precision: 15 digits Program functions: Jump Cond Subr Lbl Ind  
Memories: 500(0) kilobytes Program display: Formula display  
Program memory: 500 kilobytes and 5 megabytes Program editing: Formula entry  
Chipset:   Forensic result:  

[HP Xpander]Here's a nice gift that arrived from Germany just a few days ago (thank you, Sebastian!) A Casio Classpad 300.

This sophisticated calculator is very similar to HP's cancelled Xpander project, with one crucial difference: the Classpad 300 has full programmability. Like the Xpander, the Classpad 300 is really more than a calculator; it is more like a mathematical PDA with a full-blown operating system supporting built-in mathematics programs.

This particular device has obviously been used a lot, as evidenced by the wear and tear. Curiously, the misaligned menu label is not a result of abuse: I checked and it is attached at an angle internally to the backside of the display glass, clearly a manufacturing defect. Otherwise, the device is still working perfectly.

For now, I am still familiarizing myself with this very interesting machine, but of course I already constructed a Gamma function example. The following simple user-defined function computes the logarithm of the Gamma function for any argument with a positive real part: