Search-engine filters: Many search engines, such as Google and Alta Vista offer users the option of turning on a safety filter.

Many small engines, such as those found in mopeds or garden machinery, are single cylinder and use only a single piston, simplifying crankshaft design.

Many early aircraft engines ( and a few in other applications ) had the crankshaft fixed to the airframe and instead the cylinders rotated, known as a rotary engine design.

Many model airplanes use very simple " glow " and " Diesel " engines.

Many of the heat engines just mentioned are turbines.

Many engines overlap these steps in time ; turbine engines do all steps simultaneously at different parts of the engines.

Many different systems have been used in the past but modern engines are usually started by an electric motor in the small and medium sizes or by compressed air in the large sizes.

Many Zeppelins had 12-cylinder engines from German manufacturers Maybach and Daimler.

Many older V6 engines were based on V8 engine designs, in which a pair of cylinders was cut off the front of V8 without altering the V angle or using a more sophisticated crankshaft to even out the firing interval.

Many sites, in particular search engines, use spidering as a means of providing up-to-date data.

Many companies and hobbyists adapt Mazda rotary engines ( taken from automobiles ) to aircraft use ; others, including Wankel GmbH itself, manufacture Wankel rotary engines dedicated for the purpose.

Many robot simulators feature physics engines to simulate a robot's dynamics.

Many search engines check for instances of spamdexing and will remove suspect pages from their indexes.

Many Stirling cycle heat engines can be run backwards to act as a refrigerator, and therefore these engines have a niche use in cryogenics.

Many touring car series, such as the BTCC and the now-defunct JTCC distinguish themselves from sports car racing by featuring front-wheel drive, four-wheel drive and rear-wheel drive cars with smaller engines.

Many electronically-generated sound effects were used, ranging from foley-style effects for props including handguns, teleport sounds, spacecraft engines, flight console buttons and background atmospheres.

Many chess engines use pondering to increase their strength.

Many modern two-stroke engines employ a power valve system.

Many " outlaw " engines are manufactured larger than these, mainly intended for vehicles which will not be used in sanctioned races and therefore do not need to comply with these regulations.

Many special gala days are held, often with visiting engines and rolling stock from other heritage lines ; these and other attractions have seen visitor numbers exceed 250, 000 per year.

Many rural fire engines still rely upon cisterns or other sources for drafting water into the pumps.

Many exchanges and inter-dealer brokers allow multi legged trades ( e. g. basis block trades on LIFFE ).

Many Slavic languages allow the trill and the lateral as syllabic nuclei ( see Words without vowels ).

Many of the challenges listed above offer a glimpse into some of the obstacles that corporations implementing a CRM suite face ; in many cases time, resources and staffing do not allow for the troubleshooting necessary to tackle an issue and the system is shelved or sidestepped instead.

Many Anglican communities allow for artificial contraception, seeing the restriction of family size as possibly not contrary to God's will.

Many rabbinic authorities allow abortions on the grounds of gross genetic imperfections of the fetus.

Many large cable systems have upgraded or are upgrading their equipment to allow for bi-directional signals, thus allowing for greater upload speed and always-on convenience, though these upgrades are expensive.

Many countries are replacing broadcast analog television with digital television to allow other uses of the television radio spectrum.

Many small-format digital SLR camera systems allow using many of the same lenses on both full-frame and “ cropped format ” cameras.

Many known data structures have concurrent versions that allow multiple computing threads to access the data structure simultaneously.

Many Protestant churches allow clergy and communicants to take mustum instead of wine.

Many Filipino restaurants and bars local and abroad have karaoke machines which allow customers to sing.

Many peasants chose to slaughter livestock rather than allow them to become common property.

Many operating system environments allow dynamic linking, that is the postponing of the resolving of some undefined symbols until a program is run.

Many retailers allow accumulation of fuel discounts.

Many computer-sequencing programs allow manipulation of the musical data such that composing for an entire orchestra of sounds is possible.

Many in the colony however, began to chafe against the aristocratic Family Compact who governed while benefiting economically from the region's resources, and who did not allow elected bodies the power to effect change ( much as the Château Clique ruled Lower Canada ).

Many jurisdictions, however, allow the prosecution to seek a new preliminary hearing, or even seek a bill of indictment from a grand jury.

Many of the technologies " created " for the Star Trek universe were done so out of simple economic necessity — the transporter was created because the budget of the original series in the 1960s did not allow for expensive shots of spaceships landing on planets.

Many embedded systems and RTOSs, however, allow the application itself to run in kernel mode for greater system call efficiency and also to permit the application to have greater control of the operating environment without requiring OS intervention.

Many people choose to retire when they are eligible for private or public pension benefits, although some are forced to retire when physical conditions no longer allow the person to work any more ( by illness or accident ) or as a result of legislation concerning their position.

Many states also allow their use in bicycle lanes or on roads with speed limits of up to 25 mph.

Many trailers are equipped with a movable tandem to allow adjusting the weight distribution.

Many systems allow individuals certain personal allowances and other nonbusiness reductions to taxable income.

Many of the older and more traditional schools often take longer to allow students to test for higher ranks than newer, more contemporary schools, as they may not have the required testing intervals.

Many attempts have been made to amend the Constitution to allow Congress to prohibit the desecration of the flag.