Although ion engines had been developed at NASA since the late 1950s, with the exception of the SERT missions in the 1960s, the technology had not been demonstrated in flight.

Although hurricanes occasionally form in the Pacific, they seldom affect El Salvador, with the notable exception of Hurricane Mitch and Hurricane Emily in 1998.

Although these continental European powers controlled various coastal regions of southern and eastern India during the ensuing century, they eventually lost all their territories in India to the British islanders, with the exception of the French outposts of Pondicherry and Chandernagore, the Dutch port of Travancore, and the Portuguese colonies of Goa, Daman and Diu.

Although commonly depicted being used by angels, their use in churches was limited, a prominent exception being the music of the Venetian School.

Although Albert himself only reigned for a year, from then on, every emperor was a Habsburg, with only one exception, and Austria's rulers wee also the Holy Roman Emperors, till 1806.

Although Charles Dickens had ridiculed positive depictions of Native Americans as portrayals of so-called " noble " savages, he made an exception ( at least initially ) in the case of the Inuit, whom he called “ loving children of the north ”, “ forever happy with their lot ,” “ whether they are hungry or full ”, and “ gentle loving savages ”, who, despite a tendency to steal, have a “ quiet, amiable character ” (" Our Phantom Ship on an Antediluvian Cruise ", Household Words, April 16, 1851 ).

Although Louis took Maastricht and William's attack against Charleroi failed, Lieutenant-Admiral Michiel de Ruyter defeated the Anglo-French fleet three times, forcing Charles to end England's involvement by the Treaty of Westminster ; after 1673, France slowly withdrew from Dutch territory ( with the exception of Maastricht ), while making gains elsewhere.

Although most birds generally do not have teeth, swans are known to be an exception to this, having small jagged ' teeth ' as part of their beaks used for catching and eating fish.

( see also Slavery in the Spanish New World colonies ) Although Spain claimed the entire Caribbean, they settled only the larger islands of Hispaniola ( 1493 ), Puerto Rico ( 1508 ), Jamaica ( 1509 ), Cuba ( 1511 ), and Trinidad ( 1530 ), although the Spanish made an exception in the case of the small ' pearl islands ' of Cubagua and Margarita off the Venezuelan coast because of their valuable pearl beds which were worked extensively between 1508 and1530.

Although Europe is crisscrossed by railways, the railroads within Europe are usually not considered transcontinental, with the possible exception of the historic Orient Express.

Although most veins take blood back to the heart, there is an exception.

Although Rubiaceae are found in nearly every major region of the world ( with the exception of continental Antarctica, the high arctic, and portions of central Africa and Asia ), diversity is highest in the humid tropics.

Although the rules for distinguishing these groups are not completely hard and fast, one very good guiding principle is that butterflies have thin antennae and ( with one exception ) have small balls or clubs at the end of their antennae.

Although the Court did not specify whether the Twenty-first Amendment could provide an exception to any other constitutional protections outside of the Commerce Clause, it acknowledged " the relevance of the Twenty-first Amendment to other constitutional provisions becomes increasingly doubtful.

Although Shepherd's beaked whale is an exception, most species have only one or two pairs of teeth, and even these do not erupt in females.

Although the film is a fictionalized version of the siege of Bastogne, it is highly accurate with one major exception.

Although Off-Broadway shows are not eligible for Tony Awards, an exception was made in 1956 ( before the rules were changed ), when Lotte Lenya won for " Best Performance by a Featured Actress in a Musical ", for the Off-Broadway production of The Threepenny Opera.

Although K ' iche ' priests were generally of lower rank than secular officials, the priests of the Kaweq lineages were an exception, and this included the priests of Q ' uq ' umatz, Tepeu and Tohil.

Although Kim enjoyed many foreign forms of entertainment, according to former bodyguard Lee Young Kuk, he refused to consume any food or drink not produced in North Korea, with the exception of wine from France.

Although he had begun composing while still a schoolboy, Bliss later suppressed all his juvenilia, and, with the single exception of his 1916 Pastoral for clarinet and piano, reckoned the 1918 work Madam Noy as his first official composition.

Although hallucinations and delusions are sometimes present in delirium, these are not required for the diagnosis, and the symptoms of delirium are clinically distinct from those induced by psychosis or hallucinogens ( with the exception of deliriants.

Although The WB's well-known inability to launch successful comedy series was nothing new ( Reba being the sole exception ), this period saw the network struggling to establish new dramas as well.

Although almost ubiquitous in continental Europe and Canada, the deposit system is less common in the United Kingdom and has not been widely adopted in the United States, with the exception of some chains like Aldi, which require a $ 0. 25 deposit.

Although most of the modern buildings are unremarkable, the Art Deco Loteria Nacional building and the functionalist IMSS building are an exception.

Although Asser never mentions Alfred's law code, he does say that Alfred insisted that his judges be literate, so that they could apply themselves " to the pursuit of wisdom.

Although something like code books is implied by the model, they are nowhere represented in the model, which creates many conceptual difficulties.

Although Caltech has a strong tradition of practical jokes and pranks, student life is governed by an honor code which allows faculty to assign take-home examinations.

Although much circumstantial evidence has been found to suggest that fewer different amino acids were used in the past than today, precise and detailed hypotheses about which amino acids entered the code in what order have proved far more controversial.

Although the GIMPS software's source code is publicly available, technically it is not free software, since it has a restriction that users must abide by the project's distribution terms

Although Albania has made strides toward democratic reform and maintaining the rule of law, serious deficiencies in the electoral code remain to be addressed, as demonstrated in the June 2001 parliamentary elections.

Although Tanenbaum wished for MINIX to be as accessible as possible to students, his publisher was not prepared to offer material ( such as the source code ) that could be copied freely, so a restrictive license requiring a nominal fee ( included in the price of Tanenbaum's book ) was applied as a compromise.

Although MIDI is generally little-endian, the 4 time code bytes follow in big-endian order, followed by a " end of exclusive " byte.

Although the concept was first implemented circa 1966 ( as O-code for BCPL and P-a code for the Euler Language, Wirth & Weber, CACM Vol9 No2, 1966 ), the term p-code first appeared in the early 1970s.

Although deprecated, there is still code based on it.

Although refactoring code has been done informally for years, William Griswold's 1991 Ph. D. dissertation is one of the first major academic works on refactoring functional and procedural programs, followed by William Opdyke's 1992 dissertation on the refactoring of object-oriented programs, although all the theory and machinery have long been available as program transformation systems.

Although he is an ex-boxer ( who likes to remind readers that he once fought the former heavyweight champ Jersey Joe Walcott ) and lifts weights to stay in shape, he also is quite well educated, cooks, and lives by a code of honor he and Susan discuss occasionally — though as infrequently as he can manage.

Although the command economy approach of the communist states meant that most types of property could not be owned, the Soviet Union always had a civil code, courts that interpreted this civil code, and a civil law approach to legal reasoning ( thus, both legal process and legal reasoning were largely analogous to the French or German civil code system ).

Although its use has decreased in recent years with the demise of Morse code and the obsolescence of the teleprinter, and with the increased availability of native-font software, it is still used for the quick and handy platform-independent recording and transmission of Arabic terms and text.

Although any Unicode character can be referenced by its numeric code point, some HTML document authors prefer to use these named entities instead, where possible, as they are less cryptic and were better supported by early browsers.

Although the term implies suggestion, the process is deterministic, and done by executable code, essentially a special-purpose computer language.

Although Seymour I. Rubinstein was the principal owner of the company, Rob Barnaby was the sole author of the early versions of the program ; starting with WordStar 4. 0, the program was built on new code written principally by Peter Mierau.

Although the license of 6th Edition allowed classroom use of the source code, the license of 7th Edition specifically excluded such use, so the book spread through illegal copy machine reproductions ( a kind of samizdat ).

Although statements could be implemented with function calls they are almost always implemented with code inlining.

Although London is unincorporated, it has a post office, with the ZIP code of 76854.

Although non-spacing graphic characters are uncommon in traditional code pages, there are many such in Unicode.

Although an understanding of the complete system is usually considered necessary for good design, leading theoretically to a top-down approach, most software projects attempt to make use of existing code to some degree.

Although the SYNOP code has no separate formal classification for vertical or multi-level clouds, the observer procedure for selecting numerical codes is designed to give high reporting priority to those genera or species that show significant vertical development.