| (Brand on letter: J) | (AKA) | (Year) |
| J.C. PENNEY: 2300 | ||
| J.C. PENNEY: 2310 | 1975 | |
| J.C. PENNEY: 5000 | Rechargeable Electronic Calculator | |
| J.C. PENNEY: GL986F | ||
| J.C. PENNEY: GL986R | GL-986R | 1974 |
| J.C. PENNEY: GL996R | ||
| J.C. PENNEY: MM3MW | ||
| J.C. PENNEY: MM3R (version 1) | 1973 | |
| JANON: 3000 | LED 3000 | 197? |
| JAPY: M104 | 197? | |
| JCE (JOHN COLLINS ENTERPRISES): 33W | 197? | |
| JCE (JOHN COLLINS ENTERPRISES): ALK1 | ALK-1 | |
| JCE (JOHN COLLINS ENTERPRISES): Mark II | 1972 | |
| JCE (JOHN COLLINS ENTERPRISES): Percent | 1972 | |
| JCE (JOHN COLLINS ENTERPRISES): Super D | 1972 | |
| JCE (JOHN COLLINS ENTERPRISES): TE8M | AFCO TE-8M | |
| JEPPESEN SANDERSON: Avstar (version 1) | 1980 | |
| JEPPESEN SANDERSON: Avstar (version 2) | 1986 | |
| JEPPESEN SANDERSON: ProStar (version 1) | 1982 | |
| JEPPESEN SANDERSON: ProStar (version 2) | 1986 | |
| JET: K80M | 1972 | |
| JETSET: EC8 | EC-8 | 197? |
| JULIETTE: 890P | 1975 | |
| JUNIOR: EL601 | EL-601 | |
| 29-jul-2010: (24 Devices with letter J). | ||
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