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PROIV is a fourth-generation programming language (4GL), developed and sold by NorthgateArinso, part of the Northgate Information Solutions Group. It has an active community of around 2500 developers and end-users worldwide, ranging from consultants to large multinationals, finance institutions, tax authorities, retailers, engineering companies, media operators and software houses. PROIV's usual application domain is database-centric business applications. PROIV has some similarities to languages such as ABAP, FOCUS and RPG. PROIV programs consist of declarative/non-procedural specifications that control the overall structure of the program and database access and that have an implicit sequence of execution (which PROIV programmers refer to as the timing cycle). Procedural subroutines can be added by the programmer; these are written in a 3GL-like language which PROIV calls "Logic". Note that in PROIV programs are referred to as "functions", which can be confusing as it differs from the more usual use of that term in programming languages. == History == PROIV was developed by Sushil K. Garg working in Hawaii in 1976 on a General Automation System. In the early 1980s it was licensed to McDonnell Douglas Information Systems (MDIS). MDIS converted PROIV to run on their Pick-based systems and this spin off was known as ALL (Application Language Liberator). PROIV was ported to several different platforms by separate teams. Garg brought these ports together as one company, named Pro Computer Sciences (PCS) and headquartered in Laguna Hills, California. PCS was subsequently acquired by MDIS in 1988. During the second half of the 1980s, a PROIV team entered in the 4GL Grand Prix contests of 1987, 1988 and 1990 and the product finished second on each occasion. In 2000, McDonnell Information Systems changed its name to Northgate Information Solutions 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「PROIV」の詳細全文を読む スポンサード リンク
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