or g Writer是能够互操作的应用程序包的一部分，其中包括电子表格、向量绘图程序、表示应用程序以及其他组件。
OpenOffice.org Writer is just part of a suite of inter-operable applications including a spreadsheet, vector drawing program, presentation application, and some other components.
本文以有向几何为背景陈述一个微机绘图核心程序包，用它描写数控加工零件的平面外型轮廓，并在微机上绘制各种复杂的平面图形。
In this paper, a core program package related for drawing pictures in micro computers with Oriented Geometry is presented to describe profile of machine parts in numerical control.
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