The Siemens-Nixdorf PCD-3Nsx, launched around 1991, was a compact business notebook featuring a 16 or 20 MHz Intel 80386SX processor, 2–4 MB RAM, and an 8-inch monochrome VGA LCD. It typically came with an 80 MB hard drive and a 1.44 MB floppy drive, and was rebranded by various companies, including RM (NB300), Packard Bell (386NB), and ICL (NB386s) . Notably, it utilized a Dallas RTC chip for BIOS settings and had limited BIOS support for hard drive sizes, which can pose challenges when upgrading to modern storage solutions