ATOLL(ID:490/ato002)NASA Test languageAcceptance, Test Or Launch Language. Language used for automating the checkout and launch of Saturn rockets. References: in ACM Computing Reviews 15(04) April 1974 view details The exact number of all the programming languages still in use, and those which are no longer used, is unknown. Zemanek calls the abundance of programming languages and their many dialects a "language Babel". When a new programming language is developed, only its name is known at first and it takes a while before publications about it appear. For some languages, the only relevant literature stays inside the individual companies; some are reported on in papers and magazines; and only a few, such as ALGOL, BASIC, COBOL, FORTRAN, and PL/1, become known to a wider public through various text- and handbooks. The situation surrounding the application of these languages in many computer centers is a similar one. There are differing opinions on the concept "programming languages". What is called a programming language by some may be termed a program, a processor, or a generator by others. Since there are no sharp borderlines in the field of programming languages, works were considered here which deal with machine languages, assemblers, autocoders, syntax and compilers, processors and generators, as well as with general higher programming languages. The bibliography contains some 2,700 titles of books, magazines and essays for around 300 programming languages. However, as shown by the "Overview of Existing Programming Languages", there are more than 300 such languages. The "Overview" lists a total of 676 programming languages, but this is certainly incomplete. One author ' has already announced the "next 700 programming languages"; it is to be hoped the many users may be spared such a great variety for reasons of compatibility. The graphic representations (illustrations 1 & 2) show the development and proportion of the most widely-used programming languages, as measured by the number of publications listed here and by the number of computer manufacturers and software firms who have implemented the language in question. The illustrations show FORTRAN to be in the lead at the present time. PL/1 is advancing rapidly, although PL/1 compilers are not yet seen very often outside of IBM. Some experts believe PL/1 will replace even the widely-used languages such as FORTRAN, COBOL, and ALGOL.4) If this does occur, it will surely take some time - as shown by the chronological diagram (illustration 2) . It would be desirable from the user's point of view to reduce this language confusion down to the most advantageous languages. Those languages still maintained should incorporate the special facets and advantages of the otherwise superfluous languages. Obviously such demands are not in the interests of computer production firms, especially when one considers that a FORTRAN program can be executed on nearly all third-generation computers. The titles in this bibliography are organized alphabetically according to programming language, and within a language chronologically and again alphabetically within a given year. Preceding the first programming language in the alphabet, literature is listed on several languages, as are general papers on programming languages and on the theory of formal languages (AAA). As far as possible, the most of titles are based on autopsy. However, the bibliographical description of sone titles will not satisfy bibliography-documentation demands, since they are based on inaccurate information in various sources. Translation titles whose original titles could not be found through bibliographical research were not included. ' In view of the fact that nany libraries do not have the quoted papers, all magazine essays should have been listed with the volume, the year, issue number and the complete number of pages (e.g. pp. 721-783), so that interlibrary loans could take place with fast reader service. Unfortunately, these data were not always found. It is hoped that this bibliography will help the electronic data processing expert, and those who wish to select the appropriate programming language from the many available, to find a way through the language Babel. We wish to offer special thanks to Mr. Klaus G. Saur and the staff of Verlag Dokumentation for their publishing work. Graz / Austria, May, 1973 in ACM Computing Reviews 15(04) April 1974 view details In the evolution of automated checkout equipment, one of the most interesting problems centered on the creation of a new language. The language tapes incorporated in the computer programs had to be functional for the designer of the vehicle as well as the test engineer. Readouts on malfunctions had to make sense to persons reworking the piece of hardware that failed or had not performed properly. Obviously, each of these individuals came to the language problem from a different background and with a different goal in mind. Melding two such disciplines together was not always an easy task. Earlier in the Saturn program, Marshall Space Flight Center had developed two separate languages for computer operations-one for stage testing and one for launch site operations. This situation obviously created communications problems and was complicated by the fact that each of the stage manufacturers was also using its own computer language based on the particular requirements of its own test designers and engineers. A further entanglement involved the rapid evolution of checkout programs. Test engineers were putting new demands on the computers, and these new demands as well as the style of language had to be communicated to the programmer. To arrive at an appropriate language, either the test engineer had to learn more about programming, or the programmer had to learn more about test engineering. The solution to this dilemma was ATOLL, an acronym for Acceptance Test or Launch Language, designed to bridge many of the gaps between the test engineer, the designer of the stage, and the computer programmer. Originating in late 1963, ATOLL eased confusion and helped to normalize the many functions of automatic test and checkout encountered at the manufacturer's plant, during static firing, and during operations at the launch site Extract: Anecdote Development of checkout systems and the instrument unit reflected the same patterns as stage development. Despite attempts to rely on existing systems and equipment, the size and sophistication of the Saturn program required new development. New computer languages such as ATOLL were introduced to solve problems arising from the peculiarities of design, test, and several different contractors, each of whom had been using different computer languages. Automation of checkout and of static-firing tests of Saturn stages was a notable accomplishment, even if, some test engineers were reluctant to surrender control to new, electronic masters. in ACM Computing Reviews 15(04) April 1974 view details |