Com Cable
Com Cable
A COM cable connects your computer to a printer or other peripheral. You can find them at electronics stores or online retailers. Whether you need one depends on your setup—if you use multiple devices, it’s often useful.
A COM cable connects 9-pin or 25-pin serial ports and came before USB. You can buy them inexpensively on eBay. Unless you have outdated equipment, you probably don’t need one.
This appears to be a reference to a serial cable, though it's worth noting such cables are less common today. It might be useful to clarify if you're dealing with older technology or a specialized setup. Unless you have particular equipment from a past era, you likely won't need one.