Some weapons systems have become obsolescent while still in production, and some while still under development.

Some phonetic features, for example glottal catch or murmur, are sometimes to be assigned to segmental phonemics and sometimes to accentual systems.

Some school systems provide written instructions to principals and teachers designating when certain information is to be recorded on cumulative record forms and explaining how the information is to be summarized and used.

Some US School districts and systems return to school in August.

Some belief systems, such as those in the Abrahamic tradition, hold that the dead go to a specific plane of existence after death, as determined by a god, gods, or other divine judgment, based on their actions or beliefs during life.

Some, like Hernando De Soto, argue that much of the poverty in the Third World countries is caused by the lack of Western systems of laws and well-defined and universally recognized property rights.

Some home sewage treatment systems use biological treatment, usually beds of plants and aquaria, that absorb nutrients and bacteria and convert greywater and sewage to clear water.

Some systems are vacuum-insulated, acting something like large thermos bottles.

Some proven intensive, low-effort food-production systems include urban gardening ( indoors and outdoors ).

Some systems used a CD-ROM drive to make the files available.

Some bicycle parts, particularly hub-based gearing systems, are complex, and many cyclists prefer to leave maintenance and repairs to professional bicycle mechanics.

Some systems have proposed as many as 90 subspecies, while recent DNA analysis has identified as few as five clades.

Some modern editing systems can use OCR techniques to read BITC in situations where other forms of timecode are not available.

Some linguists, such as John DeFrancis and J. Marshall Unger have argued that genuine ideographic writing systems with the same capacities as natural languages do not exist.

Some writing systems of the world, notably the Arabic and Hebrew scripts, and derived systems such as the Urdu, Persian, Yiddish, Jawi, and Ladino scripts, are written in a form known as right-to-left ( RTL ), in which writing begins at the right-hand side of a page and concludes at the left-hand side.

Some take the approach of looking for coherent justifications of established copyright systems, while others start with general ethical theories, such as utilitarianism and try to analyse policy through that lens.

Some critics of this approach feel that while these models approach biological reality as a representation of how the system works, they lack explanatory powers because complicated systems of connections with even simple rules are extremely complex and often less interpretable than the system they model.

Some jurisdictions give priority to motorized traffic, for example setting up one-way street systems, free-right turns, high capacity roundabouts, and slip roads.

Some masters use different systems, or even no system at all.

Some light rail systems may run on a narrower gauge.

Some missiles can be fitted with any of a variety of navigation systems ( Inertial navigation, TERCOM, or satellite navigation ).

Some GC systems allow such other resources to be associated with a region of memory that, when collected, causes the other resource to be reclaimed ; this is called finalization.

Some, like VirtualBox and VMware Player run on Windows and Linux hosts and can run many other operating systems.

Some look deliberately to devices used by creators in the other arts and apply corresponding methods to their own work.

Some are used in paints along with drying oils.

Some alphabets today, such as the Hanuno ' o script, are learned one letter at a time, in no particular order, and are not used for collation where a definite order is required.

Some ancient cultures used lime-based cement for the plaster to protect against rain damage.

Some more recent studies have used the word anthophyte to describe a group which includes the angiosperms and a variety of fossils ( glossopterids, Pentoxylon, Bennettitales, and Caytonia ), but not the Gnetales.

Some drug treatments that have been used to control ataxia include: 5-hydroxytryptophan ( 5-HTP ), idebenone, amantadine, physostigmine, L-carnitine or derivatives, trimethoprim – sulfamethoxazole, vigabatrin, phosphatidylcholine, acetazolamide, 4-aminopyridine, buspirone, and a combination of coenzyme Q10 and vitamin E.

Some tall cylinders are considered ceremonial vessels, while narrow-necked jars may have been used for liquids.

Some anagrammatists indicate the method they used.

Some jurisdictions allow force to be used in defense of property, to prevent damage either in its own right, or under one or both of the preceding classes of defense in that a threat or attempt to damage property might be considered a crime ( in English law, under s5 Criminal Damage Act 1971 it may be argued that the defendant has a lawful excuse to damaging property during the defense and a defense under s3 Criminal Law Act 1967 ) subject to the need to deter vigilantes and excessive self-help.

Some approximants resemble vowels in acoustic and articulatory properties and the terms semivowel and glide are often used for these non-syllabic vowel-like segments.

Some feel that the text of Acts shows evidence of having used the Jewish historian Josephus as a source ( in which case it would have to have been written sometime after 94 AD ).

Some early AGP boards used graphics processors built around PCI and were simply bridged to AGP.

Some of the side-effects will appear after the drug has been used only for a long time.

Some argue that, overall, the evidence suggests that antipsychotics only help if they are used selectively and are gradually withdrawn as soon as possible and have referred to the " Myth of the antipsychotic ".

( Some of the terms used below are defined in Uniform polychoron # Geometric derivations.

Some early Americans used trees or bamboo poles to cross small caverns or wells to get from one place to another.

Some BBSes, called elite, WaReZ or pirate boards, were exclusively used for distributing pirated software, phreaking, and other questionable or unlawful content.

Some networks used QWK doors, and others such as RelayNet ( RIME ) and WWIVnet used non-Fido software and standards.

Some smaller designs have been used as the basis for specialist fighters, such as night fighters, and a number of fighters, such as the Hawker Hurricane were used as ground attack aircraft bombers, replacing earlier conventional light bombers that proved unable to defend themselves and carry a reasonable bombload.

Some heavy metro infrastructures were built in Brussels, Antwerp and the Charleroi area, but these are currently used by light rail vehicles, and their conversion to full metro is not envisaged at present due to lack of funds.

Some Burundian rebel groups have used neighboring countries as bases for insurgent activities.