Radio Shack EC-4044

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: Alphanumeric display  
New price:   Display color: Black  
    Display technology: Liquid crystal display 
Size: 6"×3"×½" Display size: 12 characters
Weight: 4 oz    
    Entry method: Formula entry 
Batteries: 2×"LR44" button cell Advanced functions: Trig Exp Hyp Lreg Cplx Cmem BaseN 
External power:   Memory functions: +/-/×/÷/^ 
    Programming model: Formula programming 
Precision: digits Program functions:  
Memories: 55(0) numbers Program display: Formula display  
Program memory: 440 program steps Program editing: Formula entry  
Chipset: Texas Instruments TI-68   Forensic result:  

ec4044.jpg (23976 bytes)The Radio Shack EC-4044 is another Texas Instruments calculator sold under the Radio Shack brand name. Specifically, it's an OEM version of the TI-68. Only the color scheme is different; the buttons, their functions, and the calculators' characteristics are identical. A curious difference is that whereas Texas Instruments did not call the TI-68 as a programmable calculator, the EC-4044 carries the label "advanced programmable scientific".