| Manufacturer | Part Number | Description |
|---|---|---|
National Semiconductor (now Texas Instruments)
| DM74LS471 | (256 X 8) 2048-BIT TTL PROM |
Fairchild (now onsemi)
| DM74LS47 | BCD to 7-Segment Decoder/Driver |
MSI
| DM74LS47 | BCD/7-Segment Decoder/Driver |
