With legacy interfaces such as RS-232 serial obsolete and clearly phased out of PC motherboard standards, those still needing the interface, such as for connecting MODEMs, telecom equipment, robotics, etc., are finding themselves in need of devices such as the TRENDNet TU-S9. Simply put, this is an adapter cable with a USB connector on one side, and a RS-232 9-pin male connector on the other. The cable between the two is about 7 cm long. Operating systems such as Windows 7-thru-98; and Mac OS X 10.1-thru-10.6 are supported. The TU-S9 from TRENDNet is priced at US $12.99.