I also have an assortment of literature (ads, glossies, buyer's guides) from the 1973-1984 era that I was starting to scan.

Electronic Calculators I have

Manufacturer

Model

S/N

Digits

Display

Precision

Functional?

Have manuals?

Have A/C?

Have the battery?

A/C OK w/o battery?

Have carry case?

Have original box?

Date acquired

Cost me

Source

Status

Comments

Info

HP

Quick Calc

CNA 54509207

8

LCD

8

Yes

No

N/A

Presumably under the 10 screws.

N/A

N/A

No

2025-03-09

$5?

West Valley flea

Four banger w/%, memory

HP

12C

2323A00860

10,7+2

LCD

10

Yes

Yes

N/A

3xLR44

N/A

Yes

No

2025-03-09

$5?

West Valley flea

I was hoping for one with an uncluttered back.

TI

SR-50

SR50 0052741

10+2

LED

13

Yes

No

No

Use SR-51A’s


No

No

2025-03-09

$5?

West Valley flea

Very clean

Could feed it DC, but which is +?

TI

SR-56

SR-56 003865

10+2

LED

13

Yes

Yes

Yes

Use SR-51A’s


Yes

Yes

2025-03-09

$20?

West Valley flea

Use SR-51A battery pack


SR-56

SHARP

EL-W516X

2F015

10+2

LCD

10

Yes

No

N/A

LR44, solar

N/A

Slide

No

2025-03-09

$10?

West Valley flea

WriteView

HP

67/97 Math Pac 1












2025-03-09

$25.00

West Valley flea

Get card reader working


HP

67/97 Stat Pac 1












2025-03-09

$25.00

West Valley flea

Get card reader working


HP

38E

1849A16766

10,7+2

LED

10

No, weird display

Yes

Yes

No, have door


yes

yes

2025-03-09

$20?

West Valley flea

Prepared foil

Same as HP-38C sans continuous memory; the manual mentions it not.

(Kenko)

fx-82LB

10,8+2, 12 internally

LCD


yes

no

N/A

2xAA


no

no

2014-03-03

$10 (not $1?)

ebay

Generic 56-function. RadioShack EC-4030, Truly SC107A

Canon

X Mark I

12

LCD


yes

maybe

no

solar


no

yes

2014-07-12

$3?

DeAnza

Cost/Sell/Margin

X Mark I

Casio

memory-8R Y-811

8

VFD


yes

no

no

2xAA


yes

yes

before 1979

free

mom's Avon promo

two replacements unearthed

Two, as new in box, individually numbered

Casio memory-8R

Casio

fx-115MS

12,10+2

LCD


yes

no

solar

2xAA under 6 screws


hard cover

no

2023-08-13

$10

West Valley

just got

logical, scientific, complex, non-programmable

Casio fx-115MS

Casio

fx-250HC

10,10+2

LCD


yes

no

N/A

2xAA under 6 screws


hard cover

no

2023-04-16

$2

West Valley

scientific. DMS, fractions entry

Casio fx-250HC

Casio

fx-300MS

10,10+2

LCD


yes

no

N/A

solar


no

no

2016-04-09

$1

DeAnza

Loaned to my son for 9th grade science.

scientific. DMS, fractions entry

Casio fx-300MS

Ceptre

SL-110

8

LCD


yes

no

N/A

coin?

N/A

no

no

2019-10-05

$0

found under dishwasher while replacing

works

4-banger, square root, memory, percent

Ceptre SL-110

HP

10C

2244A08343

10,7+2

LCD

10

yes

hpmuseum DVD

N/A

3xES76

N/A

no

no

2014-09-03

$105

ebay

desk drawer

arrived with contents intact

HP-10C

HP

11C

2528A12562

10,7+2

LCD

10

parts mule for other 11C

hpmuseum DVD

N/A

3xES76

N/A

rigid

no

2014-04-12

$60

ebay

desk drawer

as-was

HP-11C

HP

11C

2128A00260

10,7+2

LCD

10

yes, after shorting the C

hpmuseum DVD

N/A

3xES76

N/A

no

no

2014-08-22

$42

ebay

desk drawer

seller could not reset it

HP-11C

HP

12C

3628M03202, too modern

10,7+2

LCD

10

yes

yes

N/A

3xES76

N/A

yes

no

1999-05-08

$30

Foothill Flea Market

desk drawer

financial

HP-12C

HP

12C Platinum

CNA 51400760

10,7+2

LCD

10

yes

no

N/A

1xCR2032

N/A

no

no

2018-08-11

$10

Foothill Flea Market

desk drawer

financial, RPN/ALG

HP

12C Platinum

CNA 188091C

10,7+2

LCD

10

yes

no

N/A

2xCR2032

N/A

yes

no

2022-12-02

$25

ebay

desk drawer

financial. FW loadable? RPN/ALG + Parens, backspace&restore

HP

15C

2245A05272

10,7+2

LCD

10

yes

owner's, advanced, my notes

N/A

3xES76

N/A

yes

yes

1984?

$100?

University of Minnesota bookstore

desk drawer

still use

HP-15C

HP

15C CE

03444

10,7+2

LCD

10

yes

owner's

N/A

2xCR2032

N/A

yes

yes

2024-06-09

$129

WV flea

desk top

will use

HP

16C

2239A03195

10,7+2,8 per window

LCD

10, 19

yes

owner's

N/A

3xES76

N/A

yes

yes

1984?

$100?

University of Minnesota bookstore

desk drawer

still use

HP-16C

HP

34C

1947A27754

10,7+2

LED

10

FIXED two segments out, no - sign. Need battery cover, rear sticker.

hpmuseum DVD

no

no, but two AA and foil work


no

no

2014-10-20

$53

ebay

around

three shift keys

HP-34C

HP

38C

2105S37008

10,7+2

LED

10

Need battery cover, rear sticker.

hpmuseum DVD

no

no, but two AA and foil work


no

no

2021-10-19

$26

hpmuseum forum

around

1st programmable financial

HP-38C

HP

39G

NxM

LCD


once after factory reset, but no longer

hpmuseum DVD

no

3 x AAA


no

no

2016-04-09

$5

DeAnza

few keys work, try fresh batteries

graphing

HP-39G

HP

45

1301A10402

10+2

LED

10

now

hpmuseum DVD

use -80's

3 NiCd, holder

yes

no

no

2021-09-30

$25

vintagecalc

Bad displays replaced.

Timer works.

HP-45

HP

45

13xxAxxxxx

10+2

LED

10

soon

hpmuseum DVD

use -80's

borrow other one

yes

no

no

2021-09-30

$20

vintagecalc

some segments out.

Timer works.

HP-45

HP

80

1247A06958

10+2

LED

10

fix flaky segment with pulldown resistor

hpmuseum DVD

replaced cap to reduce ripple

borrow other one

yes

yes, with QRG

no

2021-10-16

$56

ebay

fixed stuck segment; DAY leaves unnormalized integers in stack.

45 CPU also works fine

HP-80

HP

97

10+2

LED

10

yes, card reader needs repair, printer needs attention.

hpmuseum DVD

Battery must work to use A/C

rebuilt, twice

no

no

no

1999-04-11

16% of $50 lot

Weird Stuff bid sale

staging in garage

programmable, printer, card reader.

HP-97

NSC

4510 Mathematician

8,.8

LED


yes

yes

no

Generic 9V


N/A

yes

2014-01-16

$1

ebay

desk drawer

RPN, no scientific notation

NSC 4510 Mathematician

Royal

D-120

10

VFD


yes

no

no

2xD


no

no

2024-06-09

$8

WV flea

mystery GPM key

SHARP

EL-506R

10+2?, 12x1

LCD,


not with good batteries or solar

no

N/A

2xLR44

N/A

no

no

2024-04-14

$3

WV flea

solver, frac, logic, int/diff, scroll

SHARP EL-506R

SHARP

EL-5120

10+2

LCD, one column pixels fail, fixed two rows


no

yes

N/A

coin

N/A

no

no

2018-04-06

$5

C&H, Duarte

solver, frac, logic, int/diff, scroll

SHARP EL-5120

TI

SR-22

SR22 0025001

10+2

Neon

10, 12 hex

yes

no

cobbled up

N/A


no

no

1996

$10

Foothill flea market

P/S TIP34 replaced, but was diode

Rare. Full floating point scientific notation in all three bases

SR-22

TI

SR-51A

9041071

10+2

LED

13

yes

French

Euro, use

BP-1A


yes

no

2024-05-19

$8.33

West Valley flea market

Use SR-56 adapter.

hyperbolics, random #, and assorted unit conversions

SR-51A

TI

TI-34II

11A,10+2

LCD


yes

no

N/A

solar


no

no

2014-07-12

$8

DeAnza

blue

TI-34II

TI

TI-57

7553136

8+2

LED


In-pack DC dead. external 9V works, wire polarity reversed

yes

yes

yes, and board corroded in-pack


yes

yes

2021-08-08

$20

VCF West

Rebuilt battery pack.

TI-57

TI

TI-57

SRI sticker

8+2

LED


In-pack DC weak, external 9V works, wire polarity backwards.

no

no

yes, corroded in-pack


no

no

2021-09-16

$25

ebay

needs new NiCds and DC-DC, built 9V adapter

TI-57

TI

TI-58

10, 8+2

LED

13

yes

ROM

yes, same as TI-57

no


no

no

2022-04-09

$8

SVL PL flea market

drilled-out stuck screw, fattened adapter prongs, added 1000uF across batt. terms

SSM, Master Library Module

TI-58

TI

TI-83 Plus

16x8A

LCD


yes

online

N/A

4xAAA

N/A

hard slip cover

no

2006

found in classroom

wife

desk drawer

graphing programmable scientific, serial port

TI-83 Plus

TRULY

SC107A

10+8

LCD


yes

no

N/A

2xbutton

N/A

clamshell

no

2006

wife

desk drawer

Generic 56-function. Kenko FX-82LB, others

TRULY SC107A

no-name

8

LCD


yes

no

N/A

solar, button cell

N/A

mousepad

yes, FWIW

2006

gift, NDA

Taos

on desk, under mouse, easily overlooked

%, basic memory 4-banger

Manufacturer

Model

S/N

Digits

Display

Precision

Functional?

Have manuals?

Have A/C?

Have the battery?

A/C OK w/o battery?

Have carry case?

Have original box?

Date acquired

Cost me

Source

Status

Comments

Info

Electronic Calculators that vanished

Manufacturer

Model

Functional?

Have manuals?

Have A/C?

Have the battery?

Have carry case?

Have original box?

Date acquired

Cost me

Source

Status

Comments

Info

(Casio)

fx-82LB

yes

no

N/A

button

yes

no

2005-07-03

$2

LARK swap meet

missing after 2010 move

not generic

Casio

fx-115d

yes

no

N/A

solar

yes

no

1999-04-11

16% of $50 lot

Weird Stuff bid sale

missing after 2010 move

logical, scientific, complex, non-programmable

Casio fx-115d

Casio

fx-250

yes

lost?

N/A

button

yes

lost?

1986

gift

wedding party

missing after 2010 move

scientific. DMS entry

Casio fx-250

Casio

BG-15

yes

Japanese

N/A

2xbutton

yes

yes

2004-11-07

$8

Livermore fleamarket

missing after 2010 move

clock, beepy boxing game

Casio BG-15

Casio

HS-8L

yes

no

N/A

solar

no

no

2010-03-01

incalculable

FIL scavenging

missing after 2013 move

solar, square root, memory

Casio HS-8L

Casio

TP-8

mostly

no

no

4xAA

yes

no

2005-07-30

$4

LARK swap meet

missing after 2010 move

tiny printer, green fluorescent

Casio TP-8

HP

10B

yes

yes

N/A

3xES76

yes

yes

1999-06-12

$28

Foothill Flea Market

missing after 2010 move

financial

HP-10B

HP

25

revived

yes

yes

seems OK

yes

no

1999-04-11

16% of $50 lot

Weird Stuff bid sale

missing after 2010 move

programmable. working once cleaned and charged.

HP-25

NSC

835A

yes

no

no

Generic 9V

no

no?

1987?

free?

promo?

missing after 2010 move

four banger, memory, lived in glove compartment.

NSC-835A

SHARP

ELSI-8002

yes

no

EA-12A

3xAA

no

no

2002?

free

JRW?

missing after 2010 move

four banger, green flourescent

SHARP ELSI-8002

TI

58

maybe

TI-30, ROM

wrong one from TI programmer

replaced with rebuilt

yes

no

1999-04-10

$5

Foothill flea market

missing after 2010 move

only one battery terminal reparied -- "A" key nonfunctional, screws too tight

TI-58

TI

Datamath (2500B)

yes

no

no

3/4xAA

no

no

1999-07-23

JRW gift

Eugene, OR thrift store

missing after 2010 move

8-digit 4-banger with constant.

TI-2500B

TI

2550

yes

no

no

3/4xAA, corroded

no

no

2004-11-07

$8

Livermore flea market

missing after 2010 move. I actually don't remember having this one.

8-digit 4-banger with constant, memory and fixed-point. missing one foot

TI-2550

TI

Programmer

yes

yes

2x superfluous

Generic 9V

yes

yes

1999-04-11

16% of $50 lot

Weird Stuff bid sale

missing after 2010 move

logic. originally with rechargable battery pack. also came with lid for 9V battery.

TI-Programmer

TI

SR-51-II

not yet

no

yes

needs rebuild

yes

no

2000-08-26

free

SCU.MG

missing after 2010 move

No printer interface.

SR-51-II

TI

SR-56

should be

yes

yes

missing

yes

yes

1977?

$150?

Dayton's

missing after 2010 move

unit 1. lifeboat for unit 2. battery terminal broken

SR-56

TI

SR-56

think so

no

no

missing

yes

yes

1980?

free

JRW

missing after 2010 move

unit 2. uninstalled DC-DC converter, battery pack terminals broken.

SR-56

TI

TI-30 STAT

yes

no

N/A

2x Eveready 357

no

no

2001-10-13

$3

Foothill

missing after 2010 move

TI-30 STAT

TI

TI-35X

yes

Quick Reference Guide

N/A

2x Eveready 357

yes

yes

2000-05-13

$6

Foothill

missing after 2010 move

x^2 in BIN mode is ERROR?

TI-35X

Unitrex

Micro 6

yes

no

no

9V

strap

no

unk, unearthed 2001-02-08

gift?

JLP?

missing after 2010 move

basic memory 4-banger.

Unitrex Micro 6

Electronic Calculators not kept

Manufacturer

Model

Functional?

Have manuals?

Have A/C?

Have battery?

Have carry case?

Have original box?

Date acquired

Cost me

Source

Disposition

Comments

Info

Canon

CP1202

looks like, paper sticky

no

yes

N/A

no

no

1999-11-04

16% of $50 lot

Weird Stuff bid sale

Recycled

printing only, huge

Canon CP1202

Corvus

300

no longer

no

no

N/A

no

no

1978?

$89.95

Dayton's

lost or destroyed for parts.

desktop semi-scientific.

Corvus 300

Corvus

311

unknown

no

no

no

no

no

1979?

$64.95

Dayton's

lost

handheld semi-scientific.

Corvus 311

HP

45

formerly

no

no

no

no

no

1997

$20?

Foothill flea market

Sold for parts.

Timer worked.

HP-45

TI

3500

unknown

no

no

N/A

no

no

1973?

$84.95

Dayton's

lost or destroyed for parts.

My first calculator.

TI-3500

TI

SR-10

yes

no

no

no

no

no

1973?

$80?

Dayton's

Sold/traded for an SR-11?

minimal scientific, 2nd calculator owned

SR-10

TI

SR-11

yes

yes

yes

no

no

yes

1973-10

$80?

Dayton's

lost?

minimal scientific, 3rd calculator owned

SR-11