```python
mapping = {
    "fpga bitforce port scanner utility": "unknown",
    "fpga board": "unknown",
    "fpga board (mod miner quad)": "modminer quad",
    "fpga board 4x xc5vlx155t": "unknown",
    "fpga boards": "unknown",
    "fpga box": "unknown",
    "fpga cards": "unknown",
    "fpga chips": "unknown",
    "fpga cluster": "unknown",
    "fpga controller": "unknown",
    "fpga controller board": "unknown",
    "fpga controllers": "unknown",
    "fpga development board \"icarus\"": "icarus",
    "fpga devices": "unknown",
    "fpga firmware": "unknown",
    "fpga machine": "unknown",
    "fpga miners": "unknown",
    "fpga mining devices": "unknown",
    "fpga mining rig": "unknown",
    "fpga minirig": "unknown",
    "fpga products": "unknown",
    "fpga rigs": "unknown",
    "fpga single": "unknown",
    "fpga singles": "unknown",
    "fpga unit": "unknown",
    "fpga-based miner": "unknown",
    "fpgas": "unknown",
    "fractal design define xl": "unknown",
    "fractal design newton r-3 1000 watt psu": "unknown",
    "fractal psu": "unknown",
    "frame": "unknown",
    "franken-jupiter": "knc jupiter", # Assuming a custom or modified version of KNC Jupiter
    "frankenjala": "unknown",
    "frankenjup modules": "unknown",
    "frankenjups": "unknown",
    "freenas box": "unknown",
    "freezer": "unknown",
    "freezer 7 pro coolers": "unknown",
    "freezer pro 7": "unknown",
    "freq": "unknown",
    "friedcat products": "unknown",
    "front \"antminer\" label": "unknown",
    "front and back fans": "unknown",
    "front case fans": "unknown",
    "front fan": "unknown",
    "front fans": "unknown",
    "front intake fan": "unknown",
    "front panels": "unknown",
    "front-only fans (92mm)": "unknown",
    "frontpanel 10xusb2.0-hub": "unknown",
}
```