According to GPT-4:
In CPU design, a register file is a small, fast storage area made up of a set of registers. Registers are tiny storage locations within the CPU that are used to hold data temporarily. This data can include operands, instructions, addresses, or any other kind of data or instructions that might be needed quickly by the CPU to execute instructions without having to wait for data to be fetched from the slower main memory.
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The word "file" in "register file" doesn't imply a traditional file as understood in the context of file systems and persistent storage. Instead, it's used to denote a collection or a group. In the context of register files, it signifies a set or array of registers that the CPU can access. The terminology harkens back to older practices where physical records and data were grouped into files. In a similar vein, a register file groups a set of registers, providing a structured way for the CPU's instruction set architecture to access and use these registers effectively.
file一词在日常的英语中本来就有“文件夹”的意思， 也就是说file和folder在日常英语中是同义词。 而显然，它们在计算机领域指代的是不同的对象。
According to Collins Online Dictionary:
1 COUNTABLE NOUN:
A file is a box or a folded piece of heavy paper or plastic in which letters or documents are kept.
He sat behind a table on which were half a dozen files.
...a file of insurance papers.
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4 COUNTABLE NOUN:
In computing, a file is a set of related data that has its own name.