Several firms are merchandising enzyme preparation through feed manufacturers.

Several of the Commonwealth nations followed the British lead and sourced buses from British manufacturers, leading to a prevalence of double-decker buses.

Several Eastern Bloc countries adopted trolleybus systems, and their manufacturers such as Trolza exported trolleybuses to other friendly states.

Several manufacturers produced mainframe computers from the late 1950s through the 1970s.

Several other companies were second-source manufacturers of the HMOS 68000.

Several manufacturers offer software that can provide computer-control of DCC layouts.

Several concert sound subwoofer manufacturers suggest that their subs can be used for bass instrument amplification.

Several other manufacturers ' designs follow similar principles.

Several manufacturers now supply CMOS logic equivalents with TTL-compatible input and output levels, usually bearing part numbers similar to the equivalent TTL component and with the same pinouts.

Several manufacturers implemented color dot-matrix impact printing through a multi-color ribbon.

Several efforts were made by the various German manufacturers to develop a single unified keyboard system for all German concertinas ; but this was only partially accomplished at the end of the 19th century when the Chemnitzer and Carlsfelder systems were merged into the unified concertina system and a unified bandonion system was created.

Several computer manufacturers are selling computers with the Trusted Platform Module chip, notably IBM / Lenovo ThinkPads and the Dell OptiPlex GX620.

Several manufacturers offer folding tandems, either with small wheels or not, to facilitate packing and travelling.

Several high-end head set manufacturers have created some units specifically for the playback of binaural.

Several of Sebring's streets are named after automobile manufacturers or their models, as is evident in Peugeot Street, Ferrari Drive, Porsche Avenue, Vantage Terrace, Corvette Avenue, and Thunderbird Road, to name a few.

Several small manufacturers operate here and a number of antique dealers are Chenoa-based.

Several smaller brick manufacturers, along with numerous other industries, including Indiana Condensed Milk — a company purchased by Wilson ’ s Milk, a leader in canned condensed milk.

Several small manufacturers also call Great Bend home.

Several companies have moved to the area, including REC Silicon ( one of the world ’ s largest manufacturers of polysilicon, used in solar panels ), as well as tech companies including Microsoft, Yahoo and Intuit who have built large data storage facilities in Moses Lake and other nearby cities.

Several manufacturers make multi-stroke air guns including, to name a few, Sheridan, Benjamin, Daisy, and Crosman.

Several manufacturers market prepackaged cricothyrotomy kits, which enable one to use either a wire-guided percutaneous dilational ( Seldinger ) technique, or the classic surgical technique to insert a polyvinylchloride catheter through the cricothyroid membrane.

Several manufacturers have developed video laryngoscopes which employ digital technology such as the CMOS active pixel sensor ( CMOS APS ) to generate a view of the glottis so that the trachea may be intubated.

Several manufacturers have introduced full-face helmets with a flip-up front, combining the protection of a full-face with the ease of communication and donning / doffing that an open-face gives.

Several manufacturers offer computer-controlled airlift, so that the dead axles are automatically lowered when the main axle reaches its weight limit.

Combinations of the above techniques produce a " hybrid " or " hyphenated " technique .< ref name =" pmid9008869 "> Several examples are in popular use today and new hybrid techniques are under development.

On March 16, 2005, KMOS, Inc. announced that it had completed all registrations with the State of Delaware to change its corporate name to Amiga, Inc. Several companies produce Amiga hardware and software today.

Several companies produce joysticks for industrial applications using hall effect technology.

Several phenomena are well documented during witnessed meteorite falls too small to produce hypervelocity craters.

Several inventors devised machines to record sound prior to Thomas Edison's phonograph, Edison being the first to produce a device that could both record and reproduce sound.

Several economic models exist for vegetable farms: farms may grow large quantities of a few vegetables and sell them in bulk to major markets or middlemen, which requires large growing operations ; farms may produce for local customers, which requires a larger distribution effort ; farms may produce a variety of vegetables for sale through on-farm stalls, local farmer's markets, u-pick operations.

Several fretting schemes involve frets that are spaced unevenly to produce " better-sounding " chords in a limited number of keys.

Several studies have shown the availability of online dating to produce a greater closeness and intimacy between individuals because it circumvents barriers that face-to-face interactions might have.

Several of the original Sesame Street writers and producers were hired from the Captain Kangaroo staff to help produce and direct the new program when it went on the air in 1969.

“ Several computer security consulting firms produce estimates of total worldwide losses attributable to virus and worm attacks and to hostile digital acts in general.

Several quarries produce limestone and other minerals.

Several notable historians and economists such as Eric Williams, Walter Rodney and Karl Marx contend that the global capitalist economy was largely founded on the creation and produce of thousands of slave labour camps based in colonial plantations exploiting tens of millions of abducted Africans.

Several workshops soon began to produce Bornholm clocks which became popular as they were cheaper than the more authentic models produced elsewhere.

Several artists initially started producing Goa trance music and went on to produce psytrance instead.

Several growers have attempted to selectively breed habanero plants to produce hotter, heavier, and larger peppers.

Several attempts have been made to produce an artificial meat, using isolated tissues to produce it in vitro ; Jason Matheny's work on this topic, which in the New Harvest project, is one of the most commented.

Several of the communes in the Beaujolais-Villages AOC also qualify to produce their wines under the Mâconnais and Saint-Véran AOCs.

Several conditions are needed to produce foam: there must be mechanical work, surface active components ( surfactants ) that reduce the surface tension, and the formation of foam faster than its breakdown.

Several species belonging to this family are outstanding songsters: the whistlers produce an astonishing volume for their size, and the lyrebirds aside, the Grey Shrike-thrush is often regarded as the finest, most inventive songbird of them all.

Several programs exist to produce MIDI files from the score blocks of SPC files.

Several workshops were set up there to produce handmade furniture, ceramic tiles, and silks imbued with traditional Russian imagery and themes.

Several modern makers prefer to produce pipes pitched at what Northumbrian pipers refer to as F +, a pitch where the nominal G sounds approximately twenty cents sharp of F natural.