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FOCUS
FOCUS is a computer programming language and development environment. It is a language used to build database queries, and is regarded as a fourth-generation programming language (4GL). Produced by Information Builders Inc., it was originally developed for data handling and analysis on the IBM mainframe. As newer systems were developed and smaller computers became more powerful, the available platforms for FOCUS were extended to personal computers and in 1997, to the World Wide Web in the WebFOCUS product.
==Relation to other 4GLs==
RAMIS, the first 4GL, was the direct ancestor of FOCUS, having been principally developed by Gerald D. Cohen and Peter Mittelman while working at Mathematica Products Group in 1970. The product was sold by Mathematica to a number of in-house clients (including Nabisco and AT&T), and was also offered by the National CSS timesharing company for use on their VP/CSS operating system (a derivation of IBM's CP/CMS which is now called VM/CMS). In 1970, Cohen decided to leave Mathematica and form Information Builders, after which he recreated the product he had built at Mathematica in the form of FOCUS which was released in 1975. The syntax of FOCUS in its simplest elements is almost a direct clone of the syntax of RAMIS bearing a resemblance similar to the differences between various early dialects of SQL). At the same time, NCSS decided to work on its own product, later called NOMAD. All three products flourished during the 1970s and early 1980s, but Mathematica's time ran out in the mid-80s, and NCSS also failed, a victim of the personal computing revolution which obviated commercial timesharing (although it has since been revived in the form of ASPs and shared web servers). RAMIS was sold through to several companies, ultimately landing with Computer Associates. NOMAD suffered a similar fate. FOCUS, under Cohen's direction, continued to flourish by expanding their product.
Loosely competitive with SAS, FOCUS never quite reached the same degree of mainstream adoption, perhaps because it had only basic analytical and statistical functions and lacked the wide array of specialized analytic tools which made SAS the standard in fields such as pharmaceutical clinical trials. Instead, FOCUS concentrated on extreme flexibility in data import and export as well as ad hoc end-user reporting.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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