Information in these datasheets comes from many sources. I do not claim that all the information presented here is accurate and reliable.

Years of production and price information is collected from Internet sources, such as the HP Calculator Museum. Sometimes, in the absence of reliable information, the figures are my estimates. If I could not provide a reasonable estimate, I left these fields blank.

Information about size, weight, batteries and battery packs comes from examining the actual units in my collection. Size and weight information is approximate.

Programming information is based on the manuals and my experience with these calculators. For instance, even though the Texas Instruments SR-52 is described in the manual as having 20 memories, I used the figure of 22, because, as many SR-52 owners know, an additional two memories (98 and 99) can also be utilized.

The following symbols and abbreviatons are used in these calculator data sheets:

Ab/c

Fractions calculation

AC

Alternating current

BaseN

Number base calculations

Card

Magnetic card storage

Cmem

Continuous emmory

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