Many Informix customers are using I4GL as their front-end tool to write the database applications.
许多Informix客户使用I4GL作为编写数据库应用程序的前端工具。
The Groff distribution includes the groff front-end tool, the troff back-end typesetting engine, and various adjunct tools, which are used in this tutorial.
Groff 分发版中包括 groff 前端工具、troff 后端排版引擎和本教程中使用的各种附属工具。
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