| Manufacturer | Part Number | Description |
|---|---|---|
| GOULD | S2569 | DTMF Tone Generator |
| Gould | S4520 | 30-Volt Dichroic LCD Driver |
| Gould | 18CV8PC | Electrically Erasable Programmable Logic |
| Gould | PEEL18CV8PC | Electrically Erasable Programmable Logic |
| GOULD | S2569A | DTMF Tone Generator |