Panasonic laptops

5 models from 21 hardware reports. 4 of them have a memory slot you can fill.

CF-311
CF-541
FZ551
CF531
CFSZ61

Most reported models 5

ModelSeriesMemoryMost seenUpgradeReports
CF-31-5 CF-31 2 DDR3 SO-DIMM slots 16 GB 5
CF-54-2 CF-54 2 DDR3 SO-DIMM slots 16 GB 5
FZ55-2 FZ55 2 DDR4 SO-DIMM slots 32 GB 5
CF53-4 CF53 2 DDR3 SO-DIMM slots 8 GB 3
CFSZ6-2 CFSZ6 Soldered, no slot 3