Hacker News上有用户发起提问，询问是否仍有人或其所认识的人在使用DOS系统、旧式RAD开发环境或基于ISA卡的工业控制设备来维持业务运营1。该提问涉及dBase、Clipper、CLARION和Paradox等DOS时代的快速应用开发工具，以及用于控制CNC机床、分光仪和显微镜等工业仪器的ISA卡设备1。
提问者表示正在进行相关研究，探索如何在现代硬件上保持这些遗留系统的正常运行1。提问者强调"不是想销售什么，只是在做一个想法的研究"1。
A Hacker News user has launched a discussion seeking information about organizations and individuals who continue to rely on obsolete computing systems for essential business operations.1 The inquiry specifically targets users of DOS-era rapid application development environments such as dBase, Clipper, CLARION, and Paradox, as well as industrial control devices equipped with ISA cards that operate machinery including CNC machines, spectrometers, and microscopes.1 The question also extends to parallel port security dongles that may still be in use.1
The discussion initiator clarified that the inquiry stems from research rather than commercial intent, stating "not trying to sell anything, just doing research on an idea."1 The underlying motivation appears to be exploring methods to maintain the functionality of these legacy systems on contemporary hardware platforms.1
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