WordStar is a word processor application for microcomputers. It was published by MicroPro International and originally written for the CP/M-80 operating system, with later editions added for MS-DOS and other 16-bit PC OSes. 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. WordStar dominated the market in the early and mid-1980s, succeeding the market leader Electric Pencil.
WordStar was written with as few assumptions as possible about the operating system and machine hardware, allowing it to be easily ported across the many platforms that proliferated in the early 1980s. Because all of these versions had relatively similar commands and controls, users could move between platforms with equal ease. It was already popular when its inclusion with the Osborne 1 portable computer made the program the de facto standard for much of the small computer word-processing market.
As the market became dominated by the IBM PC and later Microsoft Windows, this same portable design made it difficult for the program to add new features, and affected its performance. In spite of its great popularity in the early 1980s, these problems allowed WordPerfect to take WordStar's place as the most widely used word processor from 1985 on.
Seymour I. Rubinstein was an employee of early microcomputer company IMSAI, where he negotiated software contracts with Digital Research and Microsoft. After leaving IMSAI, Rubinstein planned to start his own software company that would sell through the new network of retail computer stores. He founded MicroPro International Corporation in September 1978 and hired John Robbins Barnaby as programmer, who wrote a word processor, WordMaster, and a sorting program, SuperSort, in Intel 8080 assembly language. After Rubinstein obtained a report that discussed the abilities of contemporary standalone word processors from IBM, Xerox, and Wang Laboratories, Barnaby enhanced WordMaster with similar features and support for the CP/M operating system.
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CP/M, sigle de Control Program/Monitor ou /Microcomputer, est un système d'exploitation créé en 1974 par Gary Kildall, fondateur de Digital Research. Il est utilisé notamment sur les Amstrad CPC et Amstrad PCW, Commodore 128, TRS-80, l'Osborne 1, BBC Micro, le ZX Spectrum. Il fut utilisé sur PC, notamment livré en standard avec les Amstrad PC-1512 en plus du MS-DOS et de GEM. Pour l'Apple II, Microsoft a créé en 1980 la carte d'extension Z-80 SoftCard qui permettait l'usage du système d'exploitation de Digital Research.
WordPerfect est un logiciel de traitement de texte détenu par la société Corel. Il est à l'origine dévelopé sous contrat à l'université Brigham-Young pour tourner sur des ordinateurs Data General à la fin des années 1970. Les auteurs conservent les droits et fondent en 1979 la société Satellite Software International (SSI) à Orem dans l'Utah puis vendent la première version du programme en mars 1980 sous le nom SSI*WP. Le programme est porté sur MS-DOS sous le nom WordPerfect en 1980.
thumb|Écran du traitement de texte LibreOffice Writer. thumb|Écran du traitement de texte KWord. Un logiciel de traitement de texte permet d'utiliser un ordinateur pour rédiger, corriger et imprimer des documents écrits tels que des lettres, des articles de presse, des factures, des contrats ou encore de la publicité. Le traitement de texte est une des applications les plus populaires. Dans sa forme la plus simple, un programme permet de faire exactement ce qui est fait avec une machine à écrire.