| 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 | ||||||||||||||||||
| Make | Model | S/N | Digits | Display | Precision | Works? | Have manuals? | Have A/C? | Have battery? | A/C OK w/o battery? | Have carry case? | Have original box? | Date acquired | Cost me | Source | Status | Comments | Info |
| (Kenko) | fx-82LB | 10,8+2b | LCD | 12 | 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 | Mini Memory | none | 8, small 0,→ shows next 8 (EE kludge) | VFD | 8 | Yes | No | No | 4xAA, parallel | No | No | 2025-06-08 | $5.00 | West Valley flea | % somewhat inscrutable without manual | |||
| Casio | fx-115MS | 12,10+2 | LCD | yes | no | solar | 2xAA under 6 screws | Hard cover | no | 2023-08-13 | $10.00 | 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 | $2.00 | 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 | $1.00 | DeAnza | Loaned to my son for 9th grade science. Soon off to college with it. | scientific. DMS, fractions entry | Casio fx-300MS | |||
| Ceptre | SL-110 | 8 | LCD | yes | no | N/A | coin? | N/A | no | no | 2019-10-05 | $0.00 | found under dish washer 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 | $105.00 | 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 | $60.00 | 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 | $42.00 | ebay | desk drawer | seller could not reset it | HP-11C |
| 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. | ||
| HP | 12C | 3628M03202, too modern | 10,7+2 | LCD | 10 | yes | yes | N/A | 3xES76 | N/A | yes | no | 1999-05-08 | $30.00 | 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 | $10.00 | 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 | $25.00 | 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 | 3444 | 10,7+2 | LCD | 10 | yes | owner's | N/A | 2xCR2032 | N/A | yes | yes | 2024-06-09 | $129.00 | 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 | 33s | CNA 61503300 | 2x12 | LCD | 12 | yes | no | N/A | 2xCR2032 | N/A | No | No | 2025-09-14 | $2? $15 price tag | West Valley flea market | Low battery | ||
| 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 | no | 2014-10-20 | $53.00 | 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 | no | 2021-10-19 | $26.00 | hpmuseum forum | around | 1st programmable financial | HP-38C |
| HP | 38E | 1849A16766 | 10,7+2 | LED | 10 | No, weird display | Yes | Yes | No, have door | No | yes | yes | 2025-03-09 | $20? | West Valley flea | Prepared foil | Same as HP-38C sans continuous memory; the manual mentions it not. | |
| HP | 39G | CN03100173 | NxM | LCD | once after factory reset, but no longer | hpmuseum DVD | no | 3 x AAA | no | no | 2016-04-09 | $5.00 | 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 | $25.00 | 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 | $20.00 | vintagecalc | some segments out. | Timer works. | HP-45 |
| HP | 55 | 1505A06329 | 10+2 | LED | 10 | Yes, a bit flaky keyboard. Press lightly on top row middle 3 keys or it power cycles. | Online | yes | No, use 80’s. | Yes | No | No | 2025-04-13 | $30? | West Valley Flea | Timer accuracy looking well within spec, +600ms/17h | Case broken near R/S key. Be gentle with switches and button, else resets. Cleaned switches improved, but nearby buttons touchy. | HP-55 |
| HP | 67 | 10+2 | LED | 10 | Crd inop | QRG, card pak | Use -80’s | Yes, but dead | No? | Yes | No | 2025-11-29 | <$150 | ebay | Repair crd | Just once I’d like to get one with a working card reader | HP-67 | |
| 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 here | HP-80 |
| HP | 97 | 1708A00452 | 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 |
| 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 | |||||||||||||
| Lloyd’s | Accumatic 335 | 5J-119046 | 8+2 | VFD | 6 if irrational, else 8 | yes | no | No | 4xAA | 2025No | No | No | 2025-06-08 | $5.00 | West Valley flea | Always 8+2. pi unrounded. Trig & log 6 places, others 8 (incl sqrt). 3 x<>y 4 = is 7. auto constant. | ||
| Navtronic | EXPLORER | 6 | LCD | 6 | yes | Archive.org | N/A | 4xN | N/A | Yes | No | 2025-05-18 | $15.00 | West Valley flea | Lots of navigator functions. ENTER and = | Navtronic Explorer | ||
| NSC | 4510 Mathematician | 8,.8 | LED | yes | yes | no | Generic 9V | N/A | yes | 2014-01-16 | $1.00 | ebay | desk drawer | RPN, no scientific notation | NSC 4510 Mathematician | |||
| Olympia | Ariane 8 | None | 8, 6+2, 5+2 if < 0 | LCD | 8 | Yes | No | N/A | 2xAA | N/A | yes | No | 2025-06-08 | $5.00 | West Valley flea market | Uneven segments | ||
| Royal | D-120 | 10 | VFD | yes | no | no | 2xD | no | no | 2024-06-09 | $8.00 | 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 | $3.00 | 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 | |||
| 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 | ||
| TI | BA II PLUS | 3A+10, 3A+7+2 | LCD | 12 | yes | No | N/A | CR2032 | N/A | Sliding cover | no | 2025-06-08 | $0.50 | West Valley flea | 1991 version | TI BA II PLUS | ||
| TI | PC-100A | PC-100A 026707 | 20 | Thermal paper | 20 | Yes. Requires attached calculator for paper buttons to work. | Yes | Yes. Cord fits Heathkit IB-1103 also! | TI-59 battery in charging slot. | Yes | Dust cover | No | 2025-04-13 | Part of $75 box including paper | West Valley Flea | SR-51A and SR-56 work. TI-58 does, too. Also SR-51, TI-59. | Hard to mount SR-51 properly. SR-51A fits and works! | PC-100A |
| TI | SR-22 | SR22 0025001 | 10+2 | Neon | 10, 12 hex | yes | no | cobbled up | N/A | no | no | 1995-06-18? | 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-50 | SR50 0052741 | 10+2 | LED | 13 | Died of overvoltage. Resurrected with another SR-50 guts | No | No | Use SR-51A’s | No | No | 2025-03-09 | $5? | West Valley flea market | Very clean | Could feed it DC, but which is +? | SR-50 | |
| TI | SR-50 | SR50 | 10+2 | LED | 13 | Cosmetically poor working donor for other SR-50. | No | No | Use SR-51A’s | No | No | 2025-11-29 | $25.00 | ebay | Much wear, display lens loose | Repair candidate. | SR-50 | |
| TI | SR-51 | SR51 0047786 | 10+2 | LED | 13 | Yes | Owner’s | AC9200 | Use SR-51A’s | No | no | yes | 2025-04-13 | $10? | West Valley Flea | TBD | SR-51 V2 | |
| TI | SR-51A | 9041071 | 10+2 | LED | 13 | yes | French | Euro | 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 | SR-52 | SR-52 938612 | 10+2 | LED | 13 | Mostly | QRG | no | No. One battery terminal broken off, rattling around inside. | yes | yes | 2025-05-18 | $40.00 | West Valley flea | Repaired 1978-02-23 | Has full mag card set, including head cleaner. Gummy wheel, though. | SR-52 | |
| 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 | My first programmable | SR-56 | |
| TI | TI-30Xa | N-0699A is date code | 10+2 | LCD | Kind of. Display shows activity, but nothing useful | No | N/A | 2xLR44 | N/A | N/A | no | 0025-06-08 | $5.00 | West Valley flea | zebra connector | TI-30Xa | ||
| TI | TI-30X II S | L-1019Q | 11A, 10(+2) | LCD | 14 | Yes | No | N/A | +solar | N/A | Cover | No | 2025-07-13 | $5.00 | West Valley flea market | TI-30X II S | ||
| TI | TI-36X Pro | L-0521E | 3.5x16A | LCD | 13 | Yes | No | N/A | N/A | Cover | No | 2025-07-13 | $5.00 | West Valley flea market | TI-36X Pro | |||
| TI | TI-34II | 11A,10+2 | LCD | yes | no | N/A | solar | no | no | 2014-07-12 | $8.00 | DeAnza flea market | 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 | $20.00 | 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 | $25.00 | ebay | needs new NiCds and DC-DC, built 9V adapter | TI-57 | |||
| TI | TI-58 | 5974725 | 10, 8+2 | LED | 13 | yes | ROM | yes, same as TI-57 | no | no | no | 2022-04-09 | $8.00 | SVL PL flea market | drilled-out stuck screw, fattened adapter prongs, added 1000uF across batt. terms | SSM, Master Library Module. Has blank keys from TI-58C. | TI-58 | |
| TI | TI-58C | 9490671 | 10,8+2 | LED | 13 | Sort of. Weirdness with custom module | QRG, BA1, | No | No | Yes | No | 2025-05-18 | $20.00 | West Valley flea | No registers, all program space. Won’t let me adjust it. Constant Memory doesn’t last overnight w/o power, which solved that problem. | Many keys blank, has IRS 1979-80 module. Swapped blank keys for normal ones form TI-58. | TI-58C | |
| TI | TI-59 | 9794060 | 10, 8+2 | LED | 13 | All but cardreader | For most modules | Yes | In PC-100A charging slot | No | No | 2025-04-13 | Part of $75 box, carrdreader in pieces. | West Valley Flea | Still trying to assemble card reader. | Included about 8 SW modules. | TI-59 | |
| 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 | ||
| TI | TI-150 | 150-004573 | 8 | Custom Panaplex | 8 | yes | No | No | 4xAA, tight fit | Yes | No | 2025-09-14 | $3? | West Valley flea market | Silver trim worn off or never applied | Auto-constant all functions. Only handheld panaplex ever made | TI-150 | |
| TI | 2500 | D0000-01131 | 8 | LED | 8 | Yes | no | No, weird 3-pin plug | Alas, no. takes 6 AA Nicads in series. All I have are the red and black leads. | ? | Yes | No | 2025-04-13 | $10? | West Valley Flea | Need to arrange power | Mostly “DataMath”. 2500 appears only once in fine print on the rear label. | TI-2500-1 |
| TI | 3500 | 150900S | 10 | Neon | 10 | Yes. | Online | Yes | N/A | Yes | No | No | 2025-04-13 | $10.00 | West Valley Flea | Sticky keys. Cured by repetitive stress therapy. | My first calculator. | TI-3500 |
| TRULY | SC107A | 10+8 | LCD | yes | no | N/A | 2xbutton | N/A | Clam shell | 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 | ||||
| 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. Replaced. | 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. Replaced. | only one battery terminal repaired -- "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. Replaced. | 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. Replaced. | 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. Replaced. Twice. | Timer worked. | HP-45 | |||||
| TI | 3500 | unknown | no | no | N/A | no | no | 1973? | $84.95 | Dayton's | lost or destroyed for parts. Replaced. | 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 |
