Some technologies have disappeared on their own, like those big floppy disks that used to be standard on every IBM PC.

某些技术自身消失得无影无踪，如曾经作为IBM PC机标准配置的大型软盘。

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For the PC, the bootable CD generally conforms to the El Torito specification, which treats a special file on the disc (possibly hidden) as a floppy diskette image.

对于PC来说，可启动CD通常遵守elTorito规范，这会将磁盘上的某个文件(可能是隐藏的)当作一个软盘映像来使用。

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A new interface circuit is researched and designed by the author it can be connected with PC-1500 computer and floppy disk machine.

本文研究并设计了一种新的接口电路，使PC - 1500计算机能够与软磁盘机配接、并能通过键盘编制注解文件。

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A new interface circuit is researched and designed by the author it can be connected with PC-1500 computer and floppy disk machine.

本文研究并设计了一种新的接口电路，使PC - 1500计算机能够与软磁盘机配接、并能通过键盘编制注解文件。

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