The now Very Rare ISA 3Com 3C509B Etherlink III TPO is an older network interface card (NIC) that was commonly used in desktop computers in the 1990s and early 2000s. • Interface: ISA (Industry Standard Architecture) • Form Factor: ISA expansion card • Speed: 10 Mbps (Ethernet) • LED Indicators: Link activity and speed • Compatibility: Compatible with a wide range of desktop computers and operating systems, including Windows, Linux, and DOS. • Manufacturer: 3Com • Model Number: 3C509B-TPO Overall, the 3Com 3C509B Etherlink III TPO was a popular and reliable NIC that provided fast and reliable network connectivity for desktop computers in the 1990s and early 2000s.
eBay