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四、粮油收购计算机从四位机的4位二进制字长对于十进制(BCD)数值运算的优越性和四位机起源于台式计算器这一历史渊源,就不难明白为什么四位机会在通用、商用和各种专用计算器上得到了最广泛的应用。在国内,四位机开发得最早和推广量最大的项目也是在这一领域里,而且具有明显的国情特色:应用的对象集中在广大的农村——农付产品的收购结算工作。因为国内收购政策的特殊性,是无法用进口ECR来取代的。下面以温州市电子技术研究所研制的WLJ粮油收购计算机为例,说明四位机在商用计算领域的开发过程和应用情况。
Fourth, the acquisition of grain and oil computer from the four-bit machine 4 binary word The superiority of numerical operation for the decimal (BCD) and four-bit machine originated in the history of desktop calculators, it is not hard to understand why the four opportunities in the general, Commercial and various special calculators have been the most widely used. In China, the projects with the earliest and the most extensive promotion of the fourth machine are also in this field, with obvious characteristics of national conditions: the applications are concentrated in the acquisition and settlement work of the vast rural-rural pay-products. Because of the particularity of the domestic acquisition policy, it can not be replaced by imported ECR. The following to Wenzhou Institute of Electronic Technology developed WLJ grain and oil acquisition computer, for example, illustrates the four-bit machine in the field of commercial computing development process and application.