Modern use of AAC began in the 1950s with systems for users who had lost the use of speech following surgical procedures.

Modern weather systems also include wind shear and turbulence detection and terrain and traffic warning systems.

Modern coastal artillery ( for example, Russia's " Bereg " system ) is often self propelled, ( allowing it to avoid counter-battery fire ) and fully integrated, meaning that each battery has all of the support systems that it requires ( maintenance, targeting radar, etc.

Modern Class AB amplifiers commonly have peak efficiencies between 30 – 55 % in audio systems and 50-70 % in radio frequency systems with a theoretical maximum of 78. 5 %.

Modern imaging systems like PostScript, Asymptote, Metafont, and SVG use Bézier splines composed of cubic Bézier curves for drawing curved shapes.

Modern concrete wall systems use both external insulation and thermal mass to create an energy-efficient building.

Modern systems, such as Sogou Pinyin and Google Pinyin, predict the desired characters based on context and user preferences.

Modern flash chromatography systems are sold as pre-packed plastic cartridges, and the solvent is pumped through the cartridge.

Modern guidance systems permit precise attacks.

Modern operating systems have complex systems to properly manage memory.

Modern day control engineering ( also called control systems engineering ) is a relatively new field of study that gained a significant attention during 20th century with the advancement in technology.

Modern cartography is closely integrated with geographic information science ( GIScience ) and constitutes many theoretical and practical foundations of geographic information systems.

Modern cable systems are large, with a single network and headend often serving an entire metropolitan area or county.

The fifth and sixth versions of Gamma World take the game's tendency of mimicking other games to its logical end, adopting the rules systems of other games wholesale: The fifth edition of the game uses the Alternity rules, while the sixth edition uses the d20 Modern rules.

Modern flight management systems have evolved sufficiently to allow a crew to plan a flight not only as to route and altitude, but to specific time of arrival at specific locations.

Modern mainframes can run multiple different instances of operating systems at the same time.

Modern Digital Command Control ( DCC ) systems use alternating current.

Modern systems are designed for users to submit messages to their local servers for policy, not technical, reasons.

Modern hypertext systems with word and phrase-level linking offer more sophistication in connecting relevant information, but until the rise of wiki and other social software models, modern hypertext systems have rarely imitated Bush in providing individuals with the ability to create personal trails and share them with colleagues-or publish them widely.

Modern phonetics begins with attempts — such as those of Joshua Steele ( in Prosodia Rationalis, 1779 ) and Alexander Melville Bell ( in Visible Speech, 1867 ) — to introduce systems of precise notation for speech sounds.

Modern cleanrooms use automated, robotic wafer track systems to coordinate the process.

Modern writers, who are supposed to keep their fingers firmly upon the pulse of their subjects, insist upon drawing out this legend, prolonging its burial, when it well deserves a rest after the overexploitation of the past century.

Modern embroidered panels, framed and meant to be hung on the wall, are another aspect of this trend.

Modern Zen presentation to the West insists on the anti-authoritarian, highly pragmatic nature of the Zen belief -- scriptures are burned to make fire, action is based on direct self-confidence, and so on.

Modern music is available in several facets: raï music is a style typical of Western Algeria with his two fiefs are Oran and Sidi Bel Abbès.

Modern discussions of alchemy are generally split into an examination of its exoteric practical applications, and its esoteric aspects.

Modern definitions are concerned with the fundamental chemical reactions common to all acids.

Modern critics are more likely to find fault with the narrow definition of the citizen body, but in the ancient world the complaint if anything went in the opposite direction.

Modern antibiotics are tested using a method similar to Fleming's discovery

Modern arrows are made to a specified ' spine ', or stiffness rating, to maintain matched flexing and hence accuracy of aim.

Modern blóts are celebrated several times during the year.

Modern IFVs are well-armed infantry carriers, differencing from earlier APCs by their heavier armament allowing them to give direct-fire support during an assault.

Modern self-propelled artillery vehicles may superficially resemble tanks, but they are generally lightly armoured, too lightly to survive in direct-fire combat.

* Modern Christians typically believe it is acceptable to play instruments or to attend weddings, funerals, banquets, etc., where instruments are heard.

Modern cisterns are usually large plastic tanks.

Modern CPUs are typically 2-operand or 3-operand machines — the additional operands specify which one of many general purpose registers ( also called " general purpose accumulators ") are used as the source and destination for calculations.

Modern bridge are currently built in concrete, steel, fiber reinforced polymers ( FRP ), stainless steel or combinations of those materials.

Modern birds are characterised by feathers, a beak with no teeth, the laying of hard-shelled eggs, a high metabolic rate, a four-chambered heart, and a lightweight but strong skeleton.

Modern steal rules were fully implemented in 1898, and steals are now only credited when a runner successfully takes an extra base while the ball is being pitched, but not already hit.

Modern bicycle brakes may be: rim brakes, in which friction pads are compressed against the wheel rims ; internal hub brakes, in which the friction pads are contained within the wheel hubs ; or disc brakes, with a separate rotor for braking.

Modern variants of the Batavian founding myth are made more credible by pointing out that the Batavians were only part of the ancestry of the Dutch people, together with the Frisians, Franks and Saxons, and by tracing patterns of DNA.

Modern scholars have instead proposed that, with the eponymous Benjamin being just a metaphor, son of the south / son of the right are references to the tribe's being subordinate to the more dominant tribe of Ephraim.

Modern boomerangs used for sport are often made from carbon fibre-reinforced plastics, thin aircraft plywood, or other high-tech materials.

Modern clay bricks are formed in one of three processes-soft mud, dry press, or extruded.