HP48/HP95
Available at the Hewlett-Packard HP48 & HP95 calculators.
Pinout

| Pin | Name | Dir | Description |
|---|---|---|---|
| 1 | SHIELD | ─ | Shield |
| 2 | TXD | → | Transmit Data |
| 3 | RXD | ← | Receive Data |
| 4 | GND | ─ | Ground |
Note: Direction is HP48 relative Computer.
Available at the Hewlett-Packard HP48 & HP95 calculators.

| Pin | Name | Dir | Description |
|---|---|---|---|
| 1 | SHIELD | ─ | Shield |
| 2 | TXD | → | Transmit Data |
| 3 | RXD | ← | Receive Data |
| 4 | GND | ─ | Ground |
Note: Direction is HP48 relative Computer.