Several additional Request for Comments have proposed various extensions to the core DNS protocols.

Several optional extensions are also available, including MIPS-3D which is a simple set of floating-point SIMD instructions dedicated to common 3D tasks, MDMX ( MaDMaX ) which is a more extensive integer SIMD instruction set using the 64-bit floating-point registers, MIPS16e which adds compression to the instruction stream to make programs take up less room, and MIPS MT, which adds multithreading capability.

Several mouse gesture extensions are also available for the Mozilla Firefox browser.

Several vendors ( Cisco, Juniper, Alcatel-Lucent, Huawei, Quagga ), now implement the below two extensions to stub and NSSA area and although not covered by RFC they are considered by many to be standard features in OSPF implementations.

Several C compilers are available for the 8051, most of which feature extensions that allow the programmer to specify where each variable should be stored in its six types of memory, and provide access to 8051 specific hardware features such as the multiple register banks and bit manipulation instructions.

Several dinoflagellates, both thecate ( e. g. Ceratium hirundinella ,; Peridinium globulus ,) and nonthecate ( e. g. Oxyrrhis marina ,; Gymnodinium sp .,; and Kofoidinium spp .,), draw prey to the sulcal region of the cell ( either via water currents set up by the flagella or via pseudopodial extensions ) and ingest the prey through the sulcus.

Several of these assumptions of the original model have been removed in subsequent extensions of the model.

Several extensions to the rulebook will be published with the label C & S3, but only one really holds the attention of the gaming community, that of " Bestiary ," a collection of monsters similar to the AD & D Monster Manual.

Several runway and apron extensions were carried out through the decade to meet growing demand.

Several extensions of Chebyshev's inequality have been developed.

Several extensions of the alt.

Several extensions to existing trolleybus lines are planned, including 14-Mission service to the Daly City BART station, 6-Parnassus service to West Portal Station, 33-Stanyan service across Potrero Hill to Third Street, 45-Union-Stockton service to the Letterman Digital Arts Center in the Presidio and 24-Divisadero service into the former Hunters Point shipyard.

Several extensions have been proposed, and the extension into Birmingham city centre approved.

Several other general classes of extensions are known but no theory exists which treats all the possible extensions at one time.

Several extensions have been made including the outer south aisle which was added in 1883 by John Oldrid Scott although there is still much evidence of the original Norman work.

Several extensions have increased the pier's length to, the third longest in the UK.

Several significant redesigns and extensions have been built.

Several proposals have been put forward by various groups to expand the Melbourne rail network — proposals for additional rail lines, extensions to existing lines, as well as electrification to existing lines and new stations on existing lines.

Several other extensions allow users to process downloaded files with any software and scan the files with ClamWin.

Several extensions are planned or under construction.

Several other extensions of the railway were authorised in 1864 and 1865: these never materialised.

Several small extensions resulted in in reaching its final destination at Briton Ferry.

Several capital projects, such as the construction of a new western busway and light rail extensions were considered.

Several materials or combinations of materials can be used to construct a satisfactory feed bunk.

Several other oxidation states are known, which range from + 2 to + 7 and can be identified by their characteristic optical absorption spectra.

Several ways of implementing this exist, and hot-wire devices can be further classified as CCA ( constant-current anemometer ), CVA ( constant-voltage anemometer ) and CTA ( constant-temperature anemometer ).

Several intact arched stone bridges from the Hellenistic era can be found in the Peloponnese in southern Greece

Several topics that might be covered here are instead covered there because much more can be said about them in a human context.

Several species of fungi can be used for bioleaching.

Several CPUs can be combined in a single processing chip.

Several uses of the copula can be categorized:

Several kinds of descriptive categorizations can be applied broadly to the elements, including consideration of their general physical and chemical properties, their states of matter under familiar conditions, their melting and boiling points, their densities, their crystal structures as solids, and their origins.

Several countries can use the same name for their own distinct currencies ( for example, dollar in Australia, Canada and the United States ).

Several in vitro studies indicated that high concentrations of chromium ( III ) in the cell can lead to DNA damage.

Several simple games can be played to select one person from a group, either as a straightforward winner, or as someone who is eliminated.

Several kinds of cytochrome exist and can be distinguished by spectroscopy, exact structure of the heme group, inhibitor sensitivity, and reduction potential.

Several types of chocolate can be distinguished.

Several other quantities can be used to describe the composition of a mixture.

Several of the treasuries can be identified, among them the Siphnian Treasury, dedicated by the city of Siphnos whose citizens gave a tithe of the yield from their gold mines until the mines came to an abrupt end when the sea flooded the workings.

Several well-known criteria can be used to establish a probable diagnosis.

Several qualitative observations can be made of diffraction in general:

Several unofficial remakes of Duck Hunt have been released which enable the player to shoot the dog. The dog makes a cameo appearance in the NES game Barker Bill's Trick Shooting ( another Zapper game ) and he can be shot.

Several generations of an aphid population can exist over the lifespan of a single leaf.

Several types of brain lesions can occur in individuals with TSC and 60 %-90 % of people with TSC develop epilepsy.

Several measurements can be done on the F responses, including minimal and maximal latencies, and F wave persistence.

Several other points can be considered which contradict the " cathedral glass flow " theory:

Several " Harold and Maude " fans have since built similar hearses from E-Types and photos of them can be found online.

Several ancient written precursors to Hamlet can be identified.