| Alfabetical Brand/Type List Criteria: Prototype
 | AKA (Also Known As) | Label on Back | Product Number | Year of introduction | Classification | 
| COLECO: Lil Genius (version-1) |   | #2000 LIL GENIUS | 2000 | ~1976 | Pocket / Prototype | 
| COLECO: Lil Genius (version-3) | NEW AREA |   |   | ~1976 | Pocket / Prototype | 
| ELEKTRONIKUS MEROKESZULEKEK GYARA (EMG): 122 | hunor 122 |   | 122 | ~1974 | Pocket / Prototype | 
| ELEKTRONIKUS MEROKESZULEKEK GYARA (EMG): 201 | hunor 201 |   | 201 | ~1974 | Pocket / Prototype | 
| ELEKTRONIKUS MEROKESZULEKEK GYARA (EMG): 81 (version-2) |   |   | 81 |   | Desktop with Display / Prototype | 
| ELEKTRONIKUS MEROKESZULEKEK GYARA (EMG): 84 | hunor 84 |   | 84 | ~1974 | Pocket / Prototype | 
| ELKA: 101 (version-0) Prototype |   |   | 101 |   | Pocket / Prototype | 
| ELKA: 110 |   | electronic calculator, elka 110 |   | ~1976 | Pocket / Prototype | 
| ELKA: 61 |   |   | 61 | 1978 | Desktop with Display / Prototype | 
| HP_calcs: 9100 Prototype |   |   |   | ~1966 | Additional picture / Prototype | 
| LOGIC DESIGN: Green Machine |   |   | Green Machine | 1964 | Desktop with Display / Prototype / Memory (core) | 
| MELCOR: 670 |   |   | 670 | 1974 | Pocket / Prototype | 
| OLYMPIA: RAE6/30 |   | Typ: 6/30-3 D1, 53713 | RAE630 (RAE6/30) | ~1969 | Desktop with Display / Prototype | 
| PHILIPS: Electronic 3-function Calculator |   |   | Electronic 3-function Calculator | 1962 | Desktop with Display / Prototype | 
| PHILIPS: Electronic Balancing Machine |   |   | Electronic Balancing Machine | 1962 | Desktop with Display / Prototype / Memory (core) | 
| PHILIPS: High-speed Adding Machine |   |   | High-speed Adding Machine | 1962 | Desktop with Display / Prototype / Memory (core) | 
| PHILIPS: P210 (Prototype) |   |   | P210 | nov-1971 | Pocket / Prototype | 
| PHILIPS: P4 (Prototype) | IIL calculator |   | P4 | 1972 | Desktop with Display / Prototype | 
| SANYO: ICC804D (version-1) |   |   | ICC804D (ICC-804D) | 19-jan-1971 | Pocket / Prototype | 
| SANYO: ICC804D (version-2) | (Sakomumini E ICC-804D) |   | ICC804D (ICC-804D) | 19-jan-1971 | Pocket / Prototype | 
| SINCLAIR: 4 Function |   |   | 4 Function | ~1975 | Pocket / Prototype | 
| SINCLAIR: Science of Cambridge |   |   | Science of Cambridge |   | Pocket / Prototype | 
| SINCLAIR: Student (version-1) |   |   | Student | 197? | Pocket / Prototype | 
| SINCLAIR: Student (version-2) |   |   | Student | 197? | Pocket / Prototype | 
| SONY: 55 | SOBAX 55 |   | 55 | ~1971 | Pocket / Prototype | 
| SONY: MD5 |   |   | MD5 | mar-1964 | Desktop with Display / Prototype | 
| SONY: MD6 |   | ELECTRONIC CALCULATOR, MODEL MD-6 | MD6 (MD-6) | ~1966 | Desktop with Display / Prototype | 
| SONY: MM7 |   |   | MM7 |   | Desktop / Prototype | 
| SONY: MX11 |   |   | MX11 | 1966 | Desktop with Display / Prototype | 
| SOUTH CAROLINA APPLIED TECHNOLOGY: Bruning |   |   | Bruning | ~1973 | Pocket / Prototype | 
| SUMLOCK ANITA ELECTRONICS: Anita 800 (Prototype) |   |   | 800 | ~1972 | Pocket / Prototype | 
| SUMLOCK ANITA ELECTRONICS: Anita MKVII (version-0 Prototype) |   |   | MKVII |   | Desktop / Prototype | 
| TEXAS INSTRUMENTS: 40 Compact Computer | COMPACT COMPUTER 40 | COMPACT COMPUTER 40 PLUS, MODEL NO. CC40001, HEX-BUS COMPATIBLE | 40 | 06-jan-1983 | Personal Computer / Prototype | 
| TEXAS INSTRUMENTS: 59 (version-2) |   |   | TI59 (TI-59) | 24-may-1977 | Pocket / Card reader / Prototype | 
| TEXAS INSTRUMENTS: 88 | Programmable 88, SOLID STATE SOFTWARE | electronic calculator | TI88 (TI-88) | 1982 | Pocket / Prototype | 
| TEXAS INSTRUMENTS: Business Analyst 35II | BA-35II, STUDENT BUSINESS ANALYST, CONSTANT MEMORY | ELECTRONIC CALCULATOR | STUDENT BUSINESS ANALYST | ~1983 | Pocket / Prototype / Financial+Business | 
| TEXAS INSTRUMENTS: Business Analyst III (version-1) | BA-III, BUSINESS ANALYST, CONSTANT MEMORY |   | Business Analyst III | 1983 | Pocket / Prototype | 
| TEXAS INSTRUMENTS: CalTech |   |   | CalTech | 1967 | Pocket / Prototype | 
| TEXAS INSTRUMENTS: SR10 (version-1) |   | SR-10, electronic slide rule calculator | SR10 (SR-10) | dec-1973 | Pocket / Prototype | 
| TEXAS INSTRUMENTS: SR40 (version-1) | SR-40 |   | SR40 (SR-40) | 1975 | Pocket / Prototype | 
| TEXAS INSTRUMENTS: SR51 (version-1) | SR-51 |   |   | jan-1975 | Pocket / Prototype | 
| TEXAS INSTRUMENTS_perips: HX1100 (Video Interface) |   |   | HX1100 (HX-1100) |   | Perhiperal / Interface (video) / Prototype | 
| TEXAS INSTRUMENTS_perips: HX2000 (Digital Tape Drive) |   |   | HX2000 (HX-2000) |   | Perhiperal / Prototype | 
| TEXAS INSTRUMENTS_perips: HX5102 (Disk Drive / Controller) |   |   | HX5102 (HX-5102) | 1983 | Perhiperal / Prototype | 
|   |   |   |   |   |   | 
| 07-mar-2025:   (44 Items). |   |   |   |   |   | 
|   |   |   |   |   |   | 
| Do you know about any models not listed here ?, please do mail me or send me a picture of the device... I'll be more than happy to publish the info and mention your name for credit ... thank you ! |   |   |   |   |   | 
| click to email |   |   |   |   |   |