My suggestion is to allocate a version number to each CV. So, you could put v1, v2 and so forth. Just make sure that depending on the job you apply for, you use the right CV.
The other option is that you put a profession title at the end of the file name. So, for example:
My only concern taking this approach is that the employer may get the sense that you are applying for different industries and different roles, rather than being set on one specific area.
But at the end of the day, do what works best for you. Come up with a system that is convenient and right for you in organising your different resumes and cover letters.
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