op evel omain. It is the suffix to a domain name. eg of TLD's are .com, .net, .org, .in etc.

The part of a domain name starting with the final "dot": for example, ".com", ".edu" and ".de" are all top-level domain names. (ES:TLD - (Dominio de nivel superior), IT:TLD - (Dominio di primo livello), FR:Domaine de premier niveau)

Top Level Domain. This is the part that follows the domain name. The most popular TLD is ".com" but there are dozens more -- .org, .gov, .net, and .edu in the United States, and a two-letter TLD for every country on the planet, including .us for the United States.

The various parts of a web address are separated by dots. The top-level domain is the last part of an address. In www.antiviruslab.com that would be ".com". The top-level domain represents the highest level of name resolution. TLDs that are valid internationally are: .com (worldwide, commercial), .mil (military), .gov (US and UK government), .org (non-commercial organizations), .edu (US and UK educational institutions), .net (net administration agencies), .int (international agencies), .info, .museum, .name (individuals), .coop (cooperatives), .aero (aviation organizations). Other top-level domains are only valid in specific countries: The identifier is a 2-letter combination. Here are the most common: .de (Germany), .at (Austria), .ch (Switzerland), .fr (France), .nl (Netherlands), .pl (Poland), .es (Spain), .ca (Canada).

Thermoluminescent dosimeter used to assess exposure to radiation. Uranium.

Thermoluminescent Dosimeters

Thermoluminescent dosimeter - a type of dosimeter.