** Eunectes murinus, the green anaconda, the largest species, is found east of the Andes in Colombia, Venezuela, the Guianas, Ecuador, Peru, Bolivia, Brazil and on the island of Trinidad.

** Eunectes notaeus, the yellow anaconda, a smaller species, is found in eastern Bolivia, southern Brazil, Paraguay and northeastern Argentina.

** Eunectes deschauenseei, the dark-spotted anaconda, is a rare species found in northeastern Brazil and coastal French Guiana.

** Eunectes beniensis, the Bolivian anaconda, the most recently defined species, is found in the Departments of Beni and Pando in Bolivia.

** Well-ordering theorem: Every set can be well-ordered.

** Tarski's theorem: For every infinite set A, there is a bijective map between the sets A and A × A.

** Trichotomy: If two sets are given, then either they have the same cardinality, or one has a smaller cardinality than the other.

** The Cartesian product of any family of nonempty sets is nonempty.

** König's theorem: Colloquially, the sum of a sequence of cardinals is strictly less than the product of a sequence of larger cardinals.

** Every surjective function has a right inverse.

** Zorn's lemma: Every non-empty partially ordered set in which every chain ( i. e. totally ordered subset ) has an upper bound contains at least one maximal element.

** Hausdorff maximal principle: In any partially ordered set, every totally ordered subset is contained in a maximal totally ordered subset.

** Tukey's lemma: Every non-empty collection of finite character has a maximal element with respect to inclusion.

** Antichain principle: Every partially ordered set has a maximal antichain.

** Every vector space has a basis.

** Every unital ring other than the trivial ring contains a maximal ideal.

** For every non-empty set S there is a binary operation defined on S that makes it a group.

** The closed unit ball of the dual of a normed vector space over the reals has an extreme point.

** Tychonoff's theorem stating that every product of compact topological spaces is compact.

** In the product topology, the closure of a product of subsets is equal to the product of the closures.

** If S is a set of sentences of first-order logic and B is a consistent subset of S, then B is included in a set that is maximal among consistent subsets of S. The special case where S is the set of all first-order sentences in a given signature is weaker, equivalent to the Boolean prime ideal theorem ; see the section " Weaker forms " below.

** Any union of countably many countable sets is itself countable.

** Ecosystems: biodiversity — biome — habitat — plankton — thermocline — carbon cycle — water cycle — nitrogen cycle — food web — trophic level — saprobe — decomposition

** World wide web and peer-to-peer networks.

** Online producer, oversees the making of content for web sites

** Belkin routers for their web administration panel

** WorldWideWeb, the first web browser and editor

** Web ( web browser ), the web browser included with GNOME desktop environment ( previously known as Epiphany )

** Webs ( web hosting ), a website which allows users to create free websites

** Jordhy Ledesma, Dominican Republic web architect and poet

** Adobe Flash Player, web browser software viewer for Flash animation and video

** Enterprise Managed ( or fully managed ) switches — These have a full set of management features, including CLI, SNMP agent, and web interface.

** feed URI scheme, a non-standard URI scheme designed to facilitate subscription to web feeds

** The Dwarfen Realm ( running emulated through the web )

** Eremorph – web based resource for prediction and study of gene variations

** " Genera Concepts " web copy of Symbolic's introduction to Genera

** To allow a web site to make web requests to externally hosted resources ( e. g. images, music files, etc.

** To allow the browser to make web requests to externally hosted content on behalf of a website when cross-domain restrictions ( in place to protect websites from the likes of data theft ) prohibit the browser from directly accessing the outside domains ).

** A web browser implementation of Maxima

** Use Maxima in a web browser without downloading any software

** US Libertarian Party web site

** esophageal web,

** Email injection, a security violation technique using web email forms

** cause and effect web