The Clie NX, were a series of handheld PDAs made by Sony, their first running the Palm OS 5.0 operating system.
[2] These models featured both Memory Stick and CompactFlash card expansion ports, but the CF slot was advertised as a "Wireless Communication Slot" and was only compatible with specific Sony wireless LAN cards, the PEGA-WL100[3] and PEGA-WL110.
Third-party drivers were eventually available for these models that enabled support for CF memory storage as well.
The functionality of the Compact Flash port was expanded, and now CF cards were supported for file storage as well.
Sony produced two wireless expansion cards for these models, to provide internet access, the PEGA-WL100, and the PEGA-WL110.