Definition and Context "Envoy (WordPerfect)" refers to a proprietary portable document file format developed by Tumbleweed Communications Corporation in 1993 and later marketed by the WordPerfect Corporation. It was introduced as a competitor to Adobe's Acrobat Pro (PDF) for the purpose of preserving document formatting across different operating systems and hardware configurations without requiring the original word processing software installed on the receiving end.
Historical Development The format was first released in 1993 by Tumbleweed Communications. It was subsequently shipped with WordPerfect Office suite starting in March 1994, following Corel's acquisition of the WordPerfect Corporation. The creation of an Envoy document (.EVY) typically involved utilizing a specialized printer driver within the WordPerfect application to "print" the document into the proprietary format rather than producing a physical hard copy.
Technical Characteristics and Limitations Unlike the Portable Document Format (PDF), which eventually became an open standard with publicly available specifications, the Envoy file format remained largely undocumented and proprietary. A notable technical characteristic of the Envoy format was its inclusion of an embedded "Runtime Viewer" within the generated document files. This allowed users to view the documents without needing a separate viewer application installed on their systems; however, this feature resulted in significantly larger file sizes compared to contemporary PDFs.
Current Status The Envoy format has been rendered obsolete by the widespread adoption of the PDF standard and is no longer actively supported or developed. It serves as a historical example of early 1990s attempts to solve the problem of cross-platform document portability prior to the dominance of open standards. Due to its proprietary nature and lack of public documentation, modern software support for reading legacy Envoy files is limited, often requiring specialized conversion tools or archived versions of the original WordPerfect Office suite.
Note on Information Availability While the existence and basic function of the format are well-documented in computing history archives, specific technical details regarding its internal data structures, compression algorithms, or full specification remain scarce due to its proprietary status at the time of its active use.