isr.co.ro : glossary com (commercial) Referring to Internet addresses, a suffix that indicates an address at a commercial organization, including an address for an individual, such as "webmaster@netguide.com." Sometimes, the collection of all possible addresses of this type is referred to as the "com domain" or "com hierarchy." For historical reasons, addressing by organizational type is standard in the United States. In other countries, the standard suffix can be a country code. The equivalent to com in Romania is "co.ro" - the generic top level domain for co-mmercial organizations in Ro-mania, supplied by RomNIC