由于大规模集成电路的出现,电子计算机小型化和微型化了。其价格也剧降,如:七十年代初国际市场上1K 的存储器售价1000美元。而目前64K 的只读存储器只需5美元。这就为在机械制造领域中广泛应用提供了可能性。其二十多年来主要发展如下表。 Due to the advent of large-scale integrated circuits, electronic computers have become smaller and smaller. Its price has also dropped sharply. For example, in the early 1970s, 1K memory on the international market was priced at US$1,000. The current 64K read-only memory costs only 5 dollars. This provides possibilities for a wide range of applications in the field of machine building. Its main development over the past 20 years is as follows.